RESUMO

Plateau iris syndrome (PIS) was first coined in 1958 to describe the iris configuration of a patient, 2 years later; the concept of plateau iris was published. In 1992, the anatomic aspects of plateau iris were studied using ultrasound biomicroscopy (UBM) determining it as a form of primary angle-closure glaucoma caused by a large or anteriorly positioned ciliary body that leads to mechanical obstruction of the trabecular meshwork, this condition is most often found in young patients. We aim to review the current literature and knowledge on the diagnosis and treatment options of PIS; the search was conducted in PubMed, LILACS, and BIREME internet search sites using keywords and snowball search strategy of articles published until 2022, focusing on PIS history, epidemiology, clinical diagnosis, UBM feature, and treatment.

RESUMO

OBJETIVO: Evaluar los cambios a corto plazo en el segmento anterior ocular pos-iridotomía láser periférica, mediante tomografía de coherencia óptica de segmento anterior. MÉTODOS: Estudio longitudinal prospectivo de serie de casos en 30 pacientes (46 ojos) con sospecha de cierre angular primario. Las imágenes fueron tomadas con el equipo SL-OCT Heidelberg Engineering en el preoperatorio y a los 7 días posoperatorios. Se evaluaron variables relacionadas con mensuraciones de las estructuras del segmento anterior. RESULTADOS: Las mensuraciones de cada cuadrante fueron similares en el preoperatorio mientras en el posoperatorio hubo diferencias significativas en todas las variables a expensas de los cuadrantes nasal e inferior, excepto para la distancia iris-espolón (p = 0,926) y distancia de apertura angular a 750 Ám (p = 0,069). Los cambios posláser fueron significativos en todas las variables relacionadas con mensuraciones angulares (p = 0,000), volumen de cámara anterior (p = 0 000) y profundidad central de cámara anterior (p =0,011). La amplitud angular se incrementó como promedio en 8,7 ±,5,9 grados pos-láser y se correlacionó negativamente con las variables preoperatorias distancia iris-espolón (p =0,007), distancia de apertura angular a 500 Ám (p = 0,031), área del espacio irido-trabecular a 500 Ám (p = 0,003) y 750 Ám (p =0,026). Al comparar los cambios pos-operatorios entre ojos adelfos las diferencias no fueron significativas. CONCLUSIÓN: La iridotomía láser es efectiva en incrementar la amplitud angular, asociándose a incremento en el volumen y profundidad central de la cámara anterior en la sospecha de cierre angular primario

OBJECTIVE: To evaluate post-laser peripheral iridotomy variations of anterior ocular segment by anterior segment optical coherence tomography. METHOD: Prospective observational case series in 30 patients (46 eyes) diagnosed with primary angle- closure suspect. The tomography was obtained pre-operative and at seven days post-operative by SL-OCT Heidelberg Engineering. Quantitative variables related to anterior segment structures were analyzed before and after the laser peripheral iridotomy treatment. RESULTS: There were no pre-operative statistical differences between quadrants. In the pos-op period all variables showed significant differences particularly at inferior and nasal quadrant, except for iris-scleral spur distance (p=0.926) and angle opening distance at 750Ám (p=0.069). Pos-laser changes were significant for variables related to the angle (p=0.000), anterior chamber volume (p=0.000), and anterior chamber depth (p=0.011). The average increase in post-laser anterior chamber angle was 8.7±5.9 degrees and it was correlated negatively to pre-operative iris-scleral spur distance (p=0.007), angle opening distance at 500Ám (p=0.031), trabecular-iris space area at 500 Ám (p=0.003), and 750Ám (p= 0.026). Inter-eye differences were non significant for post-operative changes. CONCLUSION: Laser iridotomy is effective to increase the anterior chamber angle, and it is associated with the increase in anterior chamber volume and central depth in primary angle- closure suspect

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