Posterior vitreous detachment after cataract surgery in eyes with high myopia: an optical coherence tomography study.

Abstract

To compare the progression of posterior vitreous detachment (PVD) after cataract surgery in eyes with high myopia with that in eyes without high myopia. Prospective observational study. Eighty eyes of 80 patients with high myopia and 160 eyes of 160 patients without high myopia scheduled for phacoemulsification were recruited. PVD status was examined using swept-source optical coherence tomography at 2days postoperatively (baseline) and at 3, 6, and 12months postbaseline and classified into 5 stages: 0 (no PVD), 1 (paramacular PVD), 2 (perifoveal PVD), 3 (peripapillary PVD), and 4 (complete PVD). The PVD stage and incidence of progression to complete PVD of the 2 groups were compared. The mean PVD stage did not differ significantly between the groups at baseline or at 3months postbaseline but was significantly more progressed in the high myopia group than in the nonhigh myopia group at 6months and 12months postbaseline (P ≤ 0.0201). The Kaplan-Meier survival rate for complete PVD was significantly lower in the high myopia group (P = 0.0129). After adjusting for age, sex, and baseline PVD stage, the hazard ratio for complete PVD was 1.68-fold higher in the high myopia group than in the nonhigh myopia group (P = 0.0326, 95% CI 1.04-2.70). After cataract surgery, PVD progressed significantly faster in eyes with high myopia than in eyes without high myopia, and the relative risk for complete PVD was 1.68-fold higher in eyes with high myopia, suggesting that highly myopic eyes are at considerably high risk for retinal disease postoperatively.