Asunto(s)

RESUMEN

BACKGROUND: High-intensity focused ultrasound (HIFU) is a cosmetic procedure that aims to tone the skin through thermal collagen coagulation. The energy is delivered in the deep layers of the skin, and because of these characteristics, the risks of severe damage to adjacent tissue and the ocular surface may be underestimated. Previous reports have demonstrated superficial corneal opacities, cataracts, increased intraocular pressure, or ocular refractive changes in different patients following HIFU. In this case, we report deep stromal opacities associated with anterior uveitis, iris atrophy and lens opacity formation following a single HIFU superior eyelid application. CASE PRESENTATION: A 47-year-old female presented to the ophthalmic emergency department complaining of pain, hyperemia and photophobia in the right eye following a HIFU application to the superior right eyelid. A slit lamp examination showed three temporal-inferior corneal infiltrates with edema and severe anterior uveitis. The patient was treated with topical corticosteroids, and six months later, there was residual corneal opacity, iris atrophy and peripherical cataract formation. No surgical procedure was needed, and the final vision was Snellen 20/20 (1.0). CONCLUSION: The risk of severe impairment to the ocular surface and ocular tissues may be underestimated. Cosmetic surgeons and ophthalmologists must be aware of the complications, and the long-term follow-up of these changes needs further investigation and discussion. Safety protocols of the HIFU intensity threshold for thermal lesions in the eye and the use of protective eye devices should be better evaluated.

Asunto(s)

RESUMEN

Purpose: Conjunctival melanoma is a rare ocular tumor. We report a case of ocular conjunctival melanoma during topical immunosuppression, after a corneal transplant from a donor with metastatic melanoma. Observation: A 59-year-old white male presented with a progressive nonpigmented conjunctival lesion in his right eye. He had previously undergone two penetrating keratoplasties, and he was being treated with topical immunosuppression with 0.03% tacrolimus (Ophthalmos Pharma; Sao Paulo, SP/Brazil). The histopathology evaluation revealed the nodule to be a conjunctival epithelioid melanoma. The donor's death cause was disseminated melanoma. Conclusion and importance: The correlation between cancer and systemic immunosuppression after a solid organ transplant is widely known. The local influence, however, has not been reported. In this case, a causal relationship was not established. The correlation between conjunctival melanoma, exposure to topical tacrolimus immunosuppressive therapy, and the malignance characteristic of donor cornea should be better evaluated.

RESUMEN

PURPOSE: To describe and compare the autologous fibrin glue and traditional sutures for conjunctival graft attachment in patients undergoing primary pterygium excision surgery. METHOD: A randomized clinical trial included patients who underwent pterygium surgery with conjunctival autologous graft (CAG). Using randomization, a single-trained surgeon performed graft fixation with autologous glue or sutures. The glue was prepared immediately before the surgery, using the patient's blood components. After centrifugation, the plasma was collected and enhanced with calcium gluconate. Postoperative assessments were performed on Days 1, 7, 21, 30 and 180. The study evaluated postoperative edema and pain and complications. The mean surgical time was compared. Recurrence of the pterygium was assessed 6 months postoperatively. RESULTS: The study evaluated 61 eyes. Thirty-three eyes underwent pterygium surgery using the glue technique, and 28 underwent the traditional suture technique. Fifty-one patients (83.60%) had successful graft adhered to at the end of follow-up. Ten patients (10/33) lost their graft in the glue group, and only 69.70% maintained graft presence in the fourth week versus 100% of the patients in the suture group (p = 0.001). Pain scores were lower in the glue group, and clinical edema was significantly higher. There was no significant difference in graft retraction or the presence of granuloma, necrosis or postoperative infection. CONCLUSION: Autologous fibrin glue is an affordable option for CAG fixation in particular contexts where commercial fibrin glue is unavailable, and it could offer advantages compared to sutures. A higher graft loss rate was observed and might be related to topical anesthesia, and improvements to the technique are needed. CLINICALTRIALS: gov Identifier: NCT04151017. https://clinicaltrials.gov/ct2/show/NCT04151017?term=20170467&draw=1&rank=1 .

Asunto(s)

RESUMEN

PURPOSE: The aim of this study is to compare the long-term follow-up outcomes of traditional and accelerated corneal cross-linking (CXL) for keratoconus. METHODS: This retrospective comparative cohort study included patients with keratoconus who underwent corneal cross-linking (CXL) between August 2008 and December 2016. Patients treated before August 2013 underwent the traditional Dresden protocol, and those treated subsequently received the accelerated protocol, i.e., 0.1% riboflavin soaking for 10 min, followed by pulsed UV-A irradiation at 30 mW/cm2 for 8 min, and a total irradiation power of 7.2 J/cm2. The primary outcome was the success rate in halting the disease progression. The postoperative changes in visual acuity, keratometry readings, endothelial cell count and complications following accelerated CXL and conventional CXL were compared. RESULTS: This study evaluated 113 eyes over a mean follow-up period of 37.61 ± 16.34 months. It was found that 89.6% and 95.7% of the eyes were successfully treated with the traditional and accelerated protocols, respectively (p = 0.239). The corrected-distance visual acuity improved in both groups, but it was significantly better following the accelerated protocol (p = 0.037). Traditional protocol group had more postoperative complications than the accelerated group (8.9% versus 2%), although not reaching statistically significant difference (p = 0.142). There were no significant differences in the topographic (p = 0.122) and refractive (p = 0.570) outcomes. CONCLUSION: Accelerated CXL and conventional CXL are both safe and effective, and the long-term follow-up showed that the accelerated protocol was similar to the standard one in terms of halting keratoconus and achieving visual outcomes. Because of its potential benefits, the accelerated protocol may be considered for the treatment of progressive keratoconus.

Asunto(s)

RESUMEN

PURPOSE: The aim of this study is to report our results of toric intraocular lens (IOL) implantation in patients with asymmetric astigmatism, its efficacy and safety in reducing the refractive cylinder. METHODS: This is a retrospective cohort study. Patients with asymmetric astigmatism and non-progressive corneal ectasia, unable to fit hard contact lenses, with poor-corrected visual acuity or unsatisfactory spectacles-corrected visual acuity, underwent cataract surgery with toric IOL implantation. The choice of lens was individually after optical biometry examination. All surgeries were performed by a single surgeon, with a 2.75-mm clear cornea self-sealing incision at 130° axis, from December 2008 to December 2015. RESULTS: We evaluated 88 eyes of 69 patients with asymmetric astigmatism: primary, secondary to leucoma, post-radial keratectomy, post-lamellar or penetrating keratoplasty, post-LASIK, post-PRK and due to pterygium. Snellen best-corrected spectacles visual acuity increased from 0.39 ± 0.23 preoperative to 0.80 ± 0.23 postoperative. The average refractive cylinder reduced from 2.32 ± 1.78 D preoperatively to 0.87 ± 1.09 D after surgery (P < .001). Sixty-three eyes out of 88 (71%) had residual refractive cylinder ≤ 1.0 D. CONCLUSION: The favorable efficacy on visual acuity outcomes we have found suggests that toric IOL can be used in cases of asymmetric astigmatism, in order to provide better-corrected vision, less spectacles dependence and an improved quality of vision overall, which is especially important in contact lenses intolerant patients.

Asunto(s)