Incidence and Factors of Postoperative Lens Opacity after Lens-Sparing Vitrectomy for Retinopathy of Prematurity

Abstract

To determine the incidence and factors associated with lens opacity after lens-sparing vitrectomy (LSV) for retinopathy of prematurity (ROP). Retrospective, comparative case series. Among the 141 eyes of 94 patients who underwent LSV for ROP between 2006 and 2019, 108 eyes of 71 patients with a minimum follow-up of 12 months after LSV were investigated. Data were collected from patients' charts, including gender, gestational age at birth, birth weight, stage of ROP, postmenstrual age (PMA) at LSV, surgical procedure, preoperative injection of anti-vascular endothelial growth factor (VEGF) agents, subsequent retinal surgeries, and lensectomy during follow-up. Lens status at last visit, incidence and timing of lensectomy, and risk factors for lens opacity requiring lensectomy. Stages of ROP at LSV were 4A, 4B, and 5 in 92 eyes, 13 eyes, and 3 eyes, respectively. The median PMA at LSV was 40.6 weeks. Thirty-two eyes received anti-VEGF therapy before LSV. Lens opacity was found in 17 eyes (15.7%), of which 10 eyes (9.3%) underwent lensectomy. The period between LSV and lensectomy ranged from 21 days to 131.9 months (median, 21.1 months). Eleven other eyes (10.2%) underwent lensectomy as part of a reoperation for worsening of ROP. A total of 80 eyes (74.1%) preserved clear lenses at the latest follow-up examination after surgery (median, 6.8 years; range, 1-14 years). The Kaplan-Meier estimate showed that the proportion of patients with phakia at 5 and 10 years was 92.4% and 89.0%, respectively. Multivariate Cox regression analysis revealed that eyes with the use of tamponade at LSV (P= 0.005; odds ratio [OR], 25.68; 95% confidence interval [CI], 4.187-157.5) and young PMA at LSV (P= 0.033; OR, 1.047; 95% CI, 1.012-1.099) were associated significantly with lens opacity requiring lensectomy. However, anti-VEGF therapy was not associated with lens opacity requiring lensectomy. Nearly 10% of eyes required lensectomy because of lens opacity after LSV for ROP. The development of lens opacity requiring lensectomy seems to be associated with the use of tamponade and young PMA at LSV.