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ABSTRACT Purposes: To evaluate the sensitivity, specificity, and cutoff points for the ROPScore, which is based on cumulative risk factors for the prediction of retinopathy of prematurity (ROP), in a population of very low birth weight (BW) preterm infants in southern Brazil. Methods: The medical records of all preterm infants with a very low birth weight ≤1,500 g and/or gestational age ≤32 weeks screened for retinopathy of prematurity in two Brazilian institutions between August 2009 and December 2015 were retrospectively reviewed. ROPScores were calculated using birth weight and gestational age, the use of oxygen therapy with mechanical ventilation, and weight gain proportional to birth weight, as measured at postpartum week six and the need for blood transfusions. Results: The study cohort included 322 infants with a mean birth weight of 1181.8 ± 292.5 g and mean gestational age of 29.5 ± 2.3 weeks. The incidences of any stage of retinopathy of prematurity and severe retinopathy of prematurity were 68.3% and 17%, respectively. ROPScore values ranged from 8.7 to 19.9. The best cutoff point for sensitivity and specificity was 11 for any stage of retinopathy of prematurity and 14.5 for severe retinopathy of prematurity. For any stage of retinopathy of prematurity, the sensitivity and specificity of the ROPScores were 98.6% (95% confidence interval = 97.9%-99.3%) and 35.3% (95% confidence interval= 32.3%-38.3%), with a positive predictive value of 76.6% (95% confidence interval= 74.0%-79.2%) and a negative predictive value of 92.3% (95% confidence interval= 90.6%-94.0%). For severe retinopathy of prematurity, the sensitivity was 100% and specificity was 57.3% (95% confidence interval= 54.2%-60.4%), with positive predictive value of 22% (95% confidence interval= 19.4%-24.6%) and negative predictive value of 100%. The cutoff points correctly identified all infants that developed severe retinopathy of prematurity in this cohort. Conclusions: The ROPScore was useful to identify preterm babies at risk for retinopathy of prematurity. In this population, the ROPScore detected all patients at risk for any stage retinopathy of prematurity and severe retinopathy of prematurity. The ROPScore values in this study were similar to those previously described, thereby successfully validating the ROPScore for early detection of retinopathy of prematurity in very low birth weight preterm infants.

RESUMO Objetivos: Avaliar a sensibilidade, especificidade e os valores de pontos de corte do ROPScore, um escore baseado em fatores de risco cumulativos capaz de prever a ocorrência da retinopatia da prematuridade em prematuros de baixo peso no sul do Brasil. Métodos: Estudo retrospectivo por meio de análise de prontuários de todos os prematuros com peso ao nascer ≤1500g e/ou idade gestacional ≤32 semanas selecionados para retinopatia da prematuridade em duas instituições brasileiras entre agosto de 2009 e dezembro de 2015. Resultados: O estudo incluiu 322 pacientes. A média do peso ao nascer foi de 1181,8 ± 292,5 gr e a idade gestacional média foi de 29,5 ± 2,3 semanas. A incidência de retinopatia da prematuridade em qualquer estágio e retinopatia da prematuridade grave foi de 68,3% e 17%, respectivamente. Os valores do ROPScore variaram de 8,7 a 19,9. O melhor ponto de corte para sensibilidade e especificidade foi estabelecido em 11 para retinopatia da prematuridade em qualquer estágio e 14,5 para retinopatia da prematuridade grave. Para retinopatia da prematuridade em qualquer estadiamento, o ROPScore apresentou sensibilidade de 98,6% (95%IC 97,9-99,3) e especificidade de 35,3% (95%IC 32,3-38,3), valor preditivo positivo (VPP) de 76,6% (95%IC 74,0-79,2) e valor preditivo negativo de 92,3% (IC95% 90,6-94,0). Para retinopatia da prematuridade grave, foi registrada sensibilidade de 100%, especificidade de 57,3% (95%IC 54,2-60,4), valor preditivo positivo de 22% (95%IC 19,4-24,6) e valor preditivo negativo de 100%. Os pontos de corte identificaram corretamente todos os pacientes que desenvolveram qualquer estágio ou retinopatia da prematuridade grave no estudo. Conclusão: O ROPScore foi importante para detectar pacientes prematuros com risco de retinopatia da prematuridade. Nesta população, o ROPScore detectou todos os pacientes em risco para qualquer retinopatia da prematuridade em estágio e retinopatia da prematuridade grave. Este estudo mostrou valores semelhantes aos descritos anteriormente, validando com sucesso a ROPScore para detecção precoce de retinopatia da prematuridade em prematuros de muito baixo peso.

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PURPOSES: To evaluate the sensitivity, specificity, and cutoff points for the ROPScore, which is based on cumulative risk factors for the prediction of retinopathy of prematurity (ROP), in a population of very low birth weight (BW) preterm infants in southern Brazil. METHODS: The medical records of all preterm infants with a very low birth weight ≤1,500 g and/or gestational age ≤32 weeks screened for retinopathy of prematurity in two Brazilian institutions between August 2009 and December 2015 were retrospectively reviewed. ROPScores were calculated using birth weight and gestational age, the use of oxygen therapy with mechanical ventilation, and weight gain proportional to birth weight, as measured at postpartum week six and the need for blood transfusions. RESULTS: The study cohort included 322 infants with a mean birth weight of 1181.8 ± 292.5 g and mean gestational age of 29.5 ± 2.3 weeks. The incidences of any stage of retinopathy of prematurity and severe retinopathy of prematurity were 68.3% and 17%, respectively. ROPScore values ranged from 8.7 to 19.9. The best cutoff point for sensitivity and specificity was 11 for any stage of retinopathy of prematurity and 14.5 for severe retinopathy of prematurity. For any stage of retinopathy of prematurity, the sensitivity and specificity of the ROPScores were 98.6% (95% confidence interval = 97.9%-99.3%) and 35.3% (95% confidence interval= 32.3%-38.3%), with a positive predictive value of 76.6% (95% confidence interval= 74.0%-79.2%) and a negative predictive value of 92.3% (95% confidence interval= 90.6%-94.0%). For severe retinopathy of prematurity, the sensitivity was 100% and specificity was 57.3% (95% confidence interval= 54.2%-60.4%), with positive predictive value of 22% (95% confidence interval= 19.4%-24.6%) and negative predictive value of 100%. The cutoff points correctly identified all infants that developed severe retinopathy of prematurity in this cohort. CONCLUSIONS: The ROPScore was useful to identify preterm babies at risk for retinopathy of prematurity. In this population, the ROPScore detected all patients at risk for any stage retinopathy of prematurity and severe retinopathy of prematurity. The ROPScore values in this study were similar to those previously described, thereby successfully validating the ROPScore for early detection of retinopathy of prematurity in very low birth weight preterm infants.

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PURPOSE: To evaluate the incidence of intra- and postoperative complications of transconjunctival 25-gauge (25G) sutureless pars plicata lensectomy. METHODS: The medical records of patients <12 months of age with congenital cataracts who underwent 25G sutureless lensectomy were reviewed retrospectively. Patients were evaluated at postoperative days 1, 7, 15, 30, 60, and 90 and every 3 months thereafter. Visual acuity outcomes and intra- and postoperative complications were described and analyzed. RESULTS: A total of 72 eyes of 44 infants were included; 28 patients (64%) had bilateral cataract. Median follow-up was 28 months (range, 12-93 months). In 47 eyes (81%) there was improved visual acuity after surgery. Intraoperative adverse events occurred in 9 eyes (13%). Postoperative complications occurred in 14 eyes (19%): 6 eyes (8%) had secondary visual axis opacification, 6 eyes (8%) had secondary glaucoma, 1 eye (1%) had posterior synechiae, and 1 eye (1.4%) had retinal detachment. CONCLUSIONS: Transconjunctival pars plicata 25G sutureless lensectomy is a minimally invasive technique for congenital cataract treatment. No postoperative complications were observed in 81% of eyes. Visual acuity improved in 81% of the operated eyes.

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PURPOSE: This study aimed to evaluate the frequency of strabismus and chronological, etiological, and morphological features in patients with pediatric cataracts. METHODS: Medical records of pediatric patients were evaluated at the Congenital Cataract Section, Department of Ophthalmology, Federal University of São Paulo, from 2001 to 2011. Patients with congenital cataract or developmental cataract were included. The patients with traumatic cataract, cataract secondary to uveitis, radiation or drugs, aphakic or pseudophakic patients who underwent surgery in another hospital, patients with glaucoma, non-lenticular leukocorias (retinoblastoma, retinopathy of prematurity, prelenticular leukocorias), and lens subluxation were excluded from the study. The following outcomes were evaluated: frequency of chronological, etiological, and morphological features, laterality, and occurrence of associated strabismus. RESULTS: A total of 207 patients were included. One hundred and seventeen patients (56.5%) had congenital cataract and 90 patients (43.5%) had developmental cataract. One hundred and nine patients (52.6%) had unilateral cataract. In terms of morphology, 72 children (33.8%) had zonular cataract and 66 (31.9%) had total cataract. Idiopathic cataract affected 150 patients (72.5%). There were 108 patients (52.2%) with strabismus, mainly secondary esotropia. CONCLUSION: Idiopathic etiology was the most frequent cause in this group of patients. Zonular cataract was the main morphological type of cataract in the study. Unilateral cataract occurred more frequently in patients with persistent fetal vasculature (PFV). Strabismus presented in 52% of the patients. The current analysis may help establish an earlier and more accurate diagnosis of pediatric cataracts.

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AIM: To evaluate histopathological retinal and renal response after one single dose of intravitreous injection of antiangiogenic drugs ranibizumab and bevacizumab in rats. METHODS: Experimental study in 60d of life adults Wistar rats. Ten animals were included. Group 1 included 5 animals that were injected with 1 µL ranibizumab 1.25 mg in the right eye and with 1 µL of balanced salt solution (BSS) in the left eye, as control; Group 2 included 5 animals that were injected with 1 µL of bevacizumab in the right eye and with 1 µL of BSS in the fellow eye. All injections were performed with Hamilton syringes. After 15d of the interventions, all animals were sacrificed in CO2 chamber. Both eyes were enucleated and one kidney was removed, fixed and embedded in paraffin for histopathological analysis by optic microscopy. For statistical purposes the initial expected abnormal histopathological responses were defined as 0%. RESULTS: Atypical histopathological retinal response was detected in 2 eyes injected with ranibizumab (40%) as well as in 2 control eyes in group 1. Same was detected in 1 eye injected with bevacizumab (20%) as well as in 1 control eye, in group 2. The noted atypical findings were lymphocytes and eosinophils in the vitreous posterior cavity and mild retinal inflammatory reaction with ganglion cell layer edema but without clinical significance. No atypical histopathological renal response was detected. CONCLUSION: Unexpected atypical histopathological retinal response without clinical significance was observed in 3 eyes injected with antiangiogenic drugs (2 in group 1 and 1 in group 2) as well as in 3 control eyes (2 in group 1 and 1 in group 2). No atypical renal response was detected suggesting no extra ocular involvement of the intravitreous injected antiangiogenic drugs.

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Purpose: This study aimed to evaluate the frequency of strabismus and chronological, etiological, and morphological features in patients with pediatric cataracts. Methods: Medical records of pediatric patients were evaluated at the Congenital Cataract Section, Department of Ophthalmology, Federal University of São Paulo, from 2001 to 2011. Patients with congenital cataract or developmental cataract were included. The patients with traumatic cataract, cataract secondary to uveitis, radiation or drugs, aphakic or pseudophakic patients who underwent surgery in another hospital, patients with glaucoma, non-lenticular leukocorias (retinoblastoma, retinopathy of prematurity, prelenticular leukocorias), and lens subluxation were excluded from the study. The following outcomes were evaluated: frequency of chronological, etiological, and morphological features, laterality, and occurrence of associated strabismus. Results: A total of 207 patients were included. One hundred and seventeen patients (56.5%) had congenital cataract and 90 patients (43.5%) had developmental cataract. One hundred and nine patients (52.6%) had unilateral cataract. In terms of morphology, 72 children (33.8%) had zonular cataract and 66 (31.9%) had total cataract. Idiopathic cataract affected 150 patients (72.5%). There were 108 patients (52.2%) with strabismus, mainly secondary esotropia. Conclusion: Idiopathic etiology was the most frequent cause in this group of patients. Zonular cataract was the main morphological type of cataract in the study. Unilateral cataract occurred more frequently in patients with persistent fetal vasculature (PFV). Strabismus presented in 52% of the patients. The current analysis may help establish an earlier and more accurate diagnosis of pediatric cataracts. .

Objetivos: Avaliar as frequências do estrabismo e as características cronológica, etiológica e morfológica das cataratas pediátricas. Método: Estudo retrospectivo dos prontuários de crianças atendidas no Ambulatório de Catarata Congênita do Departamento de Oftalmologia da Universidade Federal de São Paulo no período entre 2001 e 2011. Foram incluídos pacientes com diagnóstico de catarata congênita ou de desenvolvimento. Foram excluídos os pacientes com catarata traumática; secundárias a uveíte, radiação ou medicamentos; pacientes operados em outro serviço; pacientes com glaucoma; leucocorias não cristalinianas (retinoblastoma, retinopatia da prematuridade, leucocorias pré-cristalinianas), e com sub-luxação do cristalino. Foram avaliadas: as frequências cronológicas, etiológicas e morfológicas das cataratas; a lateralidade e a ocorrência de estrabismo associado nestes pacientes. Resultados: Foram incluídos 207 pacientes. Cento e dezessete (56,5%) apresentavam catarata congênita e 90 (43,5%) apresentavam catarata de desenvolvimento. Cento e nove (52,6%) pacientes eram portadores de catarata unilateral. Quanto à morfologia, 72 crianças (33,8%) apresentavam catarata zonular e 66 (31,9%) apresentavam catarata total. A etiologia idiopática foi a mais frequente (72,5%) afetando 150 pacientes. Foram observados 108 pacientes (52,2%) com estrabismo associado, especialmente endotropias secundárias. Conclusões: A etiologia idiopática foi a mais frequente neste estudo. O tipo morfológico zonular foi o mais frequentemente diagnosticado. Cataratas unilaterais ocorreram mais frequentemente em pacientes com persistência da vasculatura fetal. O estrabismo associado ocorreu em 52% dos pacientes. A análise dos resultados deste estudo pode ...

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PURPOSES: To describe ocular features, management of cataract and functional outcomes in patients with persistent fetal vasculature. METHODS: Retrospective, descriptive case series of patients with persistent fetal vasculature. Data were recorded from the Congenital Cataract Section of Federal University of São Paulo, Brazil from 2001 to 2012. All patients were evaluated for sex, age at diagnosis, systemic findings, laterality, age at surgery, and initial and final follow-up visual acuities. Follow-up and complications after cataract surgery were recorded. Ultrasound was performed in all cases and ocular eco-Doppler was performed in most. RESULTS: The study comprised 53 eyes from 46 patients. Age at diagnosis ranged from 5 days of life to 10 years-old (mean 22.7 months). Twenty-seven patients were male (58.7%). Persistent fetal vasculature was bilateral in 7 patients (15.2%). Forty-two eyes (79.2%) had combined (anterior and posterior forms) PFV presentation, 5 eyes (9.4%) had only anterior persistent fetal vasculature presentation and 6 eyes (11.3%) had posterior persistent fetal vasculature presentation. Thirty-eight eyes (71.7%) were submitted to cataract surgery. Lensectomy combined with anterior vitrectomy was performed in 18 eyes (47.4%). Phacoaspiration with intraocular lens implantation was performed in 15 eyes (39.5%), and without lens implantation in 5 eyes (13.2%). Mean follow-up after surgery was 44 months. Postoperative complications were posterior synechiae (3 cases), retinal detachment (2 cases), phthisis (3 cases), posterior capsular opacification (8 cases), inflammatory pupillary membrane (5 cases), glaucoma (4 cases), intraocular lens implantation displacement (1 case) and vitreous hemorrhage (2 cases). Complications were identified in 19 (50%) of the 38 operated eyes. Visual acuity improved after cataract surgery in 83% of the eyes. CONCLUSIONS: Patients with persistent fetal vasculature have variable clinical presentation. There is an association of persistent fetal vasculature with congenital cataract. Severe complications are related to cataract surgery in patients with persistent fetal vasculature, but 83% of the operated eyes improved visual acuity.

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OBJECTIVES: This study evaluated the incidence and risk factors for severe retinopathy of prematurity (ROP) in babies <1000 g at Porto Alegre, Brazil. METHODS: Prospective cohort study including premature children with birth weight ≤1000 g was conducted. Main outcome was the occurrence of severe ROP needing treatment. RESULTS: A total of 157 infants were included. Severe ROP occurred in 20 infants (12.7%). Nineteen patients were treated by laser photocoagulation. Main risk factors for severe ROP were gestational age (P = 0.029), infant's weight measured at sixth week of life (P < 0.001) and number of days of oxygen therapy under mechanical ventilation (P < 0.001). After logistic regression, infant's weight at sixth week of life and number of days in mechanical ventilation were associated to severe ROP. CONCLUSIONS: We reported the incidence of 12.7% of severe ROP among babies born ≤ 1000 g in our institution. Laser photocoagulation was effective to stabilize the disease among 19 treated patients.

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PURPOSES: To describe ocular features, management of cataract and functional outcomes in patients with persistent fetal vasculature. METHODS: Retrospective, descriptive case series of patients with persistent fetal vasculature. Data were recorded from the Congenital Cataract Section of Federal University of São Paulo, Brazil from 2001 to 2012. All patients were evaluated for sex, age at diagnosis, systemic findings, laterality, age at surgery, and initial and final follow-up visual acuities. Follow-up and complications after cataract surgery were recorded. Ultrasound was performed in all cases and ocular eco-Doppler was performed in most. RESULTS: The study comprised 53 eyes from 46 patients. Age at diagnosis ranged from 5 days of life to 10 years-old (mean 22.7 months). Twenty-seven patients were male (58.7%). Persistent fetal vasculature was bilateral in 7 patients (15.2%). Forty-two eyes (79.2%) had combined (anterior and posterior forms) PFV presentation, 5 eyes (9.4%) had only anterior persistent fetal vasculature presentation and 6 eyes (11.3%) had posterior persistent fetal vasculature presentation. Thirty-eight eyes (71.7%) were submitted to cataract surgery. Lensectomy combined with anterior vitrectomy was performed in 18 eyes (47.4%). Phacoaspiration with intraocular lens implantation was performed in 15 eyes (39.5%), and without lens implantation in 5 eyes (13.2%). Mean follow-up after surgery was 44 months. Postoperative complications were posterior synechiae (3 cases), retinal detachment (2 cases), phthisis (3 cases), posterior capsular opacification (8 cases), inflammatory pupillary membrane (5 cases), glaucoma (4 cases), intraocular lens implantation displacement (1 case) and vitreous hemorrhage (2 cases). Complications were identified in 19 (50%) of the 38 operated eyes. Visual acuity improved after cataract surgery in 83% of the eyes. CONCLUSIONS: Patients with persistent fetal vasculature have variable clinical presentation. There is an association of persistent fetal vasculature with congenital cataract. Severe complications are related to cataract surgery in patients with persistent fetal vasculature, but 83% of the operated eyes improved visual acuity.

OBJETIVOS: Descrever as características oftalmológicas, o tratamento da catarata e os resultados funcionais em pacientes com o diagnóstico de persistência da vasculatura fetal. MÉTODOS: Estudo retrospectivo e descritivo de série de casos de pacientes com persistência da vasculatura fetal. Dados foram obtidos dos arquivos do Setor de Catarata Congênita da Universidade Federal de São Paulo, Brasil, durante o período entre 2001 a 2012. Todos os pacientes foram avaliados quanto ao sexo, idade ao diagnóstico, achados sistêmicos, lateralidade, idade à cirurgia e acuidade visual inicial e final ao seguimento. Complicações após a cirurgia da catarata foram analisadas. Ultrassom foi realizado em todos os casos e eco-Doppler foi realizado na maioria dos pacientes. RESULTADOS: O estudo incluiu 53 olhos de 46 pacientes. Idade ao diagnóstico variou de 5 dias de vida até 10 anos (média 22,7 meses). Vinte e sete pacientes eram masculinos (58,7%). A persistência da vasculatura fetal foi bilateral em 7 pacientes (15,2%). Quarenta e dois olhos (79,2%) apresentaram formas combinadas (anterior e posterior) da persistência da vasculatura fetal, 5 olhos (9,4%) tinham somente a forma anterior da persistência da vasculatura fetal e 6 olhos (11,3%) tinham a forma posterior de apresentação da persistência da vasculatura fetal. Trinta e oito olhos (71,7%) foram operados de catarata. Lensectomia com vitrectomia anterior foi realizada em 18 olhos (47,4%). Facoaspiração com implante de lente intraocular foi realizada em 15 olhos (39,5%) e sem implantação de lente em 5 olhos (13,2%). O seguimento médio após cirurgia foi de 44 meses. Complicações pós-operatórias foram: sinéquias posteriores (3 casos), descolamento da retina (2 casos), atrofia do globo ocular (3 casos), opacificação da cápsula posterior (8 casos), membrana pupilar inflamatória (5 casos), glaucoma (4 casos), deslocamento da lente implantada (1 caso) e hemorragia vítrea (2 casos). Complicações foram identificadas em 19 (50%) dos 38 olhos operados. Acuidade visual melhorou após a cirurgia da catarata em 83% dos olhos. CONCLUSÕES: Pacientes com persistência da vasculatura fetal tem apresentações clínicas variáveis. Existe uma associação da persistência da vasculatura fetal com catarata congênita. Complicações graves são associadas com a cirurgia da catarata nesses pacientes, mas 83% dos olhos operados melhoraram a acuidade visual nesse estudo.

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OBJECTIVE: Ophthalmologic examination for retinopathy of prematurity is a painful procedure. Pharmacological and non-pharmacological interventions have been proposed to reduce pain during eye examinations. This study aims to evaluate the analgesic effect of 25% glucose using a validated pain scale during the first eye examination for retinopathy of prematurity in preterm infants with birth weight <1,500 g and/or gestational age <32 weeks. METHODS: A masked, randomized clinical trial for one dose of 1 ml of oral 25% glucose solution 2 minutes before the first ophthalmologic examination for retinopathy of prematurity was conducted between March 2008 and April 2010. The results were compared to those of a control group that did not receive oral glucose solution. Pain was evaluated using a Neonatal Infant Pain Scale immediately before and immediately after the ophthalmologic examination in both groups. Clinicaltrials.gov: NCT00648687 RESULTS: One hundred and twenty-four patients who were examined for the first time for retinopathy of prematurity were included. Seventy were included in the intervention group and 54 in the control group. The number of patients with pain immediately before the procedure was similar in both groups. The number of patients with pain after ophthalmologic examination was 15.7% in the intervention group and 68.5% in the control group (p<0.001). CONCLUSIONS: One ml of oral 25% glucose solution given 2 minutes before an ophthalmologic examination for retinopathy of prematurity was an effective measure for pain relief.

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OBJECTIVE: Ophthalmologic examination for retinopathy of prematurity is a painful procedure. Pharmacological and non-pharmacological interventions have been proposed to reduce pain during eye examinations. This study aims to evaluate the analgesic effect of 25% glucose using a validated pain scale during the first eye examination for retinopathy of prematurity in preterm infants with birth weight <1,500 g and/or gestational age <32 weeks. METHODS: A masked, randomized clinical trial for one dose of 1 ml of oral 25% glucose solution 2 minutes before the first ophthalmologic examination for retinopathy of prematurity was conducted between March 2008 and April 2010. The results were compared to those of a control group that did not receive oral glucose solution. Pain was evaluated using a Neonatal Infant Pain Scale immediately before and immediately after the ophthalmologic examination in both groups. Clinicaltrials.gov: NCT00648687 RESULTS: One hundred and twenty-four patients who were examined for the first time for retinopathy of prematurity were included. Seventy were included in the intervention group and 54 in the control group. The number of patients with pain immediately before the procedure was similar in both groups. The number of patients with pain after ophthalmologic examination was 15.7% in the intervention group and 68.5% in the control group (p<0.001). CONCLUSIONS: One ml of oral 25% glucose solution given 2 minutes before an ophthalmologic examination for retinopathy of prematurity was an effective measure for pain relief.

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OBJECTIVE: To evaluate intraocular pressure in very low birth weight preterm infants and correlate it with postconceptional age. METHODS: The intraocular pressure in a prospective cohort of very low birth weight premature infants (defined as a birth weight ≤1,500 g and gestational age ≤32 weeks) admitted to Hospital de Clínicas de Porto Alegre , Brazil was evaluated weekly. The evaluated outcome was the variation in the intraocular pressure following changes in the postconceptional age (defined as the gestational age at birth plus the age in weeks at the time of examination) in the weeks following preterm birth. Mixed-effects models were used for the statistical analysis to determine the intraocular pressure variation according to postconceptional age, and means and 10th and 90th percentiles were calculated for the intraocular pressure values. RESULTS: Fifty preterm infants with a mean gestational age of 29.7 ± 1.6 weeks and a mean birth weight of 1,127.7 ± 222.7 g were evaluated. The mean intraocular pressure for the entire cohort considering both eyes was 14.9 ± 4.5 mmHg, and 13.5% of all recorded intraocular pressure values were greater than 20 mmHg. The analysis revealed a mean reduction in the intraocular pressure of 0.29 mmHg for each increase in postconceptional age (p = 0.047; 95% CI: -0.58 to -0.0035). The mean intraocular pressure (P10-P90) decreased from 16.3 mmHg (10.5222.16) at 26.3 weeks to 13.1 mmHg (7.28-18.92) at 37.6 weeks of postconceptional age. CONCLUSIONS: The mean intraocular pressure in very low birth weight preterm infants was 14.9 ± 4.5 mmHg. This value decreased 0.29 mmHg per week as the postconceptional age increased.

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OBJECTIVE: To evaluate intraocular pressure in very low birth weight preterm infants and correlate it with postconceptional age. METHODS: The intraocular pressure in a prospective cohort of very low birth weight premature infants (defined as a birth weight <1,500 g and gestational age <32 weeks) admitted to Hospital de Clínicas de Porto Alegre , Brazil was evaluated weekly. The evaluated outcome was the variation in the intraocular pressure following changes in the postconceptional age (defined as the gestational age at birth plus the age in weeks at the time of examination) in the weeks following preterm birth. Mixed-effects models were used for the statistical analysis to determine the intraocular pressure variation according to postconceptional age, and means and 10th and 90th percentiles were calculated for the intraocular pressure values. RESULTS: Fifty preterm infants with a mean gestational age of 29.7 ± 1.6 weeks and a mean birth weight of 1,127.7 ± 222.7 g were evaluated. The mean intraocular pressure for the entire cohort considering both eyes was 14.9 ± 4.5 mmHg, and 13.5% of all recorded intraocular pressure values were greater than 20 mmHg. The analysis revealed a mean reduction in the intraocular pressure of 0.29 mmHg for each increase in postconceptional age (p = 0.047; 95% CI: -0.58 to -0.0035). The mean intraocular pressure (P10-P90) decreased from 16.3 mmHg (10.5222.16) at 26.3 weeks to 13.1 mmHg (7.28-18.92) at 37.6 weeks of postconceptional age. CONCLUSIONS: The mean intraocular pressure in very low birth weight preterm infants was 14.9 ± 4.5 mmHg. This value decreased 0.29 mmHg per week as the postconceptional age increased.

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PURPOSE: To study the results of cataract surgery in children with radiation-induced cataract after treatment for retinoblastoma. METHODS: Retrospective interventional case series. Six consecutive patients diagnosed with secondary cataracts due to radiation therapy for retinoblastoma. Intervention: Phacoemulsification and foldable acrylic intraocular lens implantation. Outcomes measu- red: Visual acuity, binocular indirect ophthalmoscopy and slit-lamp biomicroscopy. Aspirated lens material and aqueous humor samples were collected during surgery. RESULTS: Six uniocular children between 3 to 5 years of age at time of surgery were studied. The mean time interval between radiotherapy and cataract diagnosis was 22.3 months. The mean follow-up after surgery was 17.2 months (range: 12 to 23 months). All eyes achieved a clear visual axis after surgery allowing monitoring of the tumor status. None developed recurrence or retinoblastoma dissemination. Histopathological analysis of the aspired material showed no tumoral cells in all samples. All patients improved vision after cataract surgery. CONCLUSIONS: Phacoemulsification with acrylic intraocular lens implantation seems to be a safe, feasible, and effective method for the removal of radiation-induced cataracts in patients with treated retinoblastoma.

OBJETIVOS: Estudar os resultados da cirurgia da catarata induzida pela radioterapia para o tratamento do retinoblastoma em crianças. MÉTODOS: Estudo retrospectivo intervencional em série de casos onde seis pacientes consecutivos apresentaram catarata secundária à terapia por radiação para o retinoblastoma. Intervenção: Facoemulsificação e implante de lente intraocular acrílica dobrável. Foram avaliadas: acuidade visual, oftalmoscopia binocular indireta e biomicroscopia. Material para análise histológica do cristalino e do humor aquoso foi coletado durante as cirurgias. RESULTADOS: Seis crianças, entre 3 e 5 anos de idade, com catarata secundária à radiação para tratamento de retinoblastoma foram submetidas à cirurgia de facoemulsificação com implante de lente intraocular. A média do intervalo de tempo decorrido entre a radioterapia e o diagnóstico da catarata foi 22,3 meses. O período médio de seguimento após a cirurgia foi de 17,2 meses (intervalo: 12 a 23 meses). Todos os olhos melhoraram a visão e mantiveram eixo visual livre permitindo a fundoscopia para monitorar o tumor. Nenhum paciente evoluiu com recorrência ou disseminação do retinoblastoma. A análise histopatológica do material colhido resultou em ausência de células tumorais nas amostras. CONCLUSÕES: A cirurgia de facoemulsificação com implante de lente intraocular acrílica dobrável mostrou ser um procedimento seguro e efetivo para o tratamento da catarata induzida pela radioterapia em pacientes portadores de retinoblastoma.

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BACKGROUND: To report a case series of nine patients presenting with leukocoria without lens opacification or retrolental abnormalities and to propose a novel classification for leukocoria. METHODS: An institutional and retrospective study including a case series of patients assisted in the Congenital Cataract Section of Federal University of São Paulo, Brazil, during the period between 2005 and 2010 with prelenticular leukocoria and clear lens. RESULTS: Nine patients younger than 4 years old presented with the diagnosis of unilateral prelenticular opacities without cataract formation. Echography in all patients revealed no posterior segment or lens abnormalities in the affected eye. Among the patients, three had idiopathic prelenticular membrane, two presented with juvenile xanthogranuloma with secondary pupillary membrane, one had persistent fetal pupillary membrane, one had prelenticular membrane due to congenital toxoplasmosis, one presented with pupillary membrane due to hyphema caused by iris hemangioma, and one had anterior segment persistent fetal vasculature. CONCLUSIONS: This case series of patients presented unilateral prelenticular leukocoria without lens opacification or posterior segment abnormalities. Several etiologies were associated with this condition. The correct diagnosis is important in order to avoid clear lens extraction. A new classification of leukocoria is proposed herein including: prelenticular leukocoria, lenticular leukocoria, retrolenticular leukocoria, and mixed presentation leukocoria.

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PURPOSE: To study the results of cataract surgery in children with radiation-induced cataract after treatment for retinoblastoma. METHODS: Retrospective interventional case series. Six consecutive patients diagnosed with secondary cataracts due to radiation therapy for retinoblastoma. INTERVENTION: Phacoemulsification and foldable acrylic intraocular lens implantation. OUTCOMES MEASURED: Visual acuity, binocular indirect ophthalmoscopy and slit-lamp biomicroscopy. Aspirated lens material and aqueous humor samples were collected during surgery. RESULTS: Six uniocular children between 3 to 5 years of age at time of surgery were studied. The mean time interval between radiotherapy and cataract diagnosis was 22.3 months. The mean follow-up after surgery was 17.2 months (range: 12 to 23 months). All eyes achieved a clear visual axis after surgery allowing monitoring of the tumor status. None developed recurrence or retinoblastoma dissemination. Histopathological analysis of the aspired material showed no tumoral cells in all samples. All patients improved vision after cataract surgery. CONCLUSIONS: Phacoemulsification with acrylic intraocular lens implantation seems to be a safe, feasible, and effective method for the removal of radiation-induced cataracts in patients with treated retinoblastoma.

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The purpose of this work was to review the studies published over the last 10 years concerning the prevalence of retinopathy of prematurity (ROP) in Latin American countries, to determine if there was an improvement in ROP prevalence rates in that period, and to identify the inclusion criteria for patients at risk of developing ROP in the screening programs. A total of 33 studies from ten countries published between 2000 and 2010 were reviewed. Prevalence of any ROP stage in the regions considered ranged from 6.6% to 82%; ROP severe enough to require treatment ranged from 1.2% to 23.8%. There was no routine screening for ROP, and there was a lack of services for treatment of the disease in many countries. Inclusion criteria for patients in the studies ranged between birth weight ≤ 1500 g and ≤ 2000 g and gestational age ≤ 32 and <37 weeks. Use of different inclusion criteria regarding birth weight and gestational age in several Latin American studies hindered comparative analysis of the published data. Highly restrictive selection criteria for ROP screening in relation to birth weight and gestational age should not be used throughout most Latin American countries because of their different social characteristics and variable neonatal care procedures. The studies included in this review failed to provide adequate information to determine if the prevalence of ROP has decreased in Latin America.

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PURPOSE: The outcomes of the treatment of retinopathy of prematurity (ROP) seem to be better in inborn patients than in those patients who were referred for ROP treatment. This study aims to investigate the timing of treatment and the outcomes in inborn patients and in patients referred for treatment to the Hospital de Clínicas de Porto Alegre, Brazil. METHODS: An institutional prospective cohort study was conducted from 2002 to 2010 and included in group 1 all inborn preterm neonates treated for retinopathy of prematurity and in group 2 all babies referred for treatment to the same institution. All of the included patients presented birth weight (BW) ≤1,500 g and/or gestational age (GA) ≤32 weeks. Main outcomes were postconceptional age at the treatment and one year follow-up outcomes in both groups. The considered variables were: BW, GA, stage and location of retinopathy of prematurity at treatment. RESULTS: Group 1 comprised 24 inborn patients. Mean BW and GA at birth were 918 ± 232 g and 28.2 ± 2.1 weeks, respectively, and median post-conceptional postconceptional age at treatment was 37 weeks. Group 2 comprised 14 infants transferred for treatment. Mean BW and GA at birth were 885 ± 188 g and 28.2 ± 2.4 weeks, respectively, and median postconceptional age at treatment was 39 weeks. Mean BW and GA were similar in both groups (P=0.654 and P=0.949, respectively), but the difference among the postconceptional age was significant (P=0.029). CONCLUSIONS: Inborn patients were treated for retinopathy of prematurity during the 37(th) week of postconceptional age while transferred patients were treated, usually, after the 39(th) week postconceptional age. The worst outcomes observed among referred patients could be partially explained by the delayed time for treatment.

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Retinopathy of prematurity (ROP) is related to oxygen-regulated vascular endothelial growth factor and to insulin-like growth factor-I. After premature birth, supplemental oxygen induces a retinal hyperoxic condition with vasoconstriction and to a definitive interruption of retinal vasculogenesis. Peripheral ischemia may stimulate retinal neovascularization and the onset of additional ROP-related complications. The natural course of the disease may result in irreversible blindness if not promptly diagnosed and attended. Recently, a significant increase in the prevalence of ROP has been observed in survival rates of preterm infants, especially in emerging-economy countries in Latin America, Asia, and Eastern Europe. This article addresses the main preventive measures in ROP.

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PURPOSE: The outcomes of the treatment of retinopathy of prematurity (ROP) seem to be better in inborn patients than in those patients who were referred for ROP treatment. This study aims to investigate the timing of treatment and the outcomes in inborn patients and in patients referred for treatment to the Hospital de Clínicas de Porto Alegre, Brazil. METHODS: An institutional prospective cohort study was conducted from 2002 to 2010 and included in group 1 all inborn preterm neonates treated for retinopathy of prematurity and in group 2 all babies referred for treatment to the same institution. All of the included patients presented birth weight (BW) <1,500 g and/or gestational age (GA) <32 weeks. Main outcomes were postconceptional age at the treatment and one year follow-up outcomes in both groups. The considered variables were: BW, GA, stage and location of retinopathy of prematurity at treatment. RESULTS: Group 1 comprised 24 inborn patients. Mean BW and GA at birth were 918 ± 232 g and 28.2 ± 2.1 weeks, respectively, and median post-conceptional postconceptional age at treatment was 37 weeks. Group 2 comprised 14 infants transferred for treatment. Mean BW and GA at birth were 885 ± 188 g and 28.2 ± 2.4 weeks, respectively, and median postconceptional age at treatment was 39 weeks. Mean BW and GA were similar in both groups (P=0.654 and P=0.949, respectively), but the difference among the postconceptional age was significant (P=0.029). CONCLUSIONS: Inborn patients were treated for retinopathy of prematurity during the 37th week of postconceptional age while transferred patients were treated, usually, after the 39th week postconceptional age. The worst outcomes observed among referred patients could be partially explained by the delayed time for treatment.

OBJETIVOS: Os resultados do tratamento da retinopatia da prematuridade (ROP) parecem ser melhores em pacientes nascidos na mesma instituição onde o tratamento foi praticado do que naqueles pacientes transferidos para o tratamento em centros de referência. Este estudo tem como objetivos investigar o momento do tratamento e seus resultados em pacientes nascidos e em pacientes transferidos para o tratamento em uma mesma instituição. MÉTODOS: Estudo de coorte institucional e prospectivo conduzido de 2002 a 2010 e incluiu no grupo 1 todos os prematuros tratados para a retinopatia da prematuridade nascidos na instituição e no grupo 2 todos os prematuros tratados para a retinopatia da prematuridade transferidos para o tratamento. Todos os pacientes incluídos tinham peso de nascimento (PN) <1.500 gramas e/ou idade gestacional (IG) <32 semanas. As principais consideradas foram a idade pós-concepção (IPC) por ocasião do tratamento e os resultados do tratamento ao final do 1º ano de vida dos pacientes nos 2 grupos. As variáveis consideradas foram: peso de nascimento, idade gestacional, estadiamento e localização da retinopatia da prematuridade por ocasião do tratamento. RESULTADOS: O grupo 1 incluiu 24 prematuros nascidos na instituição. As médias do PN e da IG foram 918 ± 232 gramas e 28,2 ± 2,1 semanas, respectivamente. A mediana da idade pós-concepção ao tratamento foi de 37 semanas. O grupo 2 incluiu 14 pacientes transferidos para o tratamento. As médias do PN e da IG foram 885 ± 188 gramas e 28,2 ± 2,4 semanas, respectivamente. A mediana da idade pós-concepção ao tratamento foi de 39 semanas. As médias dp PN e da IG eram similares nos dois grupos (P=0,654 e P=0,949, respectivamente), mas a diferença entre a idade pós-concepção ao tratamento foi significativa entre os 2 grupos (P=0,029). CONCLUSÕES: Os pacientes nascidos na instituição foram tratados para a retinopatia da prematuridade durante a 37ª semana de idade pós-concepção enquanto os pacientes transferidos foram tratados após a 39ª semanas de idade pós-concepção em média. Os piores resultados do tratamento assim como do seguimento de um ano observados entre os pacientes do grupo 2 podem ser explicados, em parte, pelo tempo maior decorrido para o tratamento da retinopatia da prematuridade.

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