Causes of Low Vision After Phacoemulsification and Intraocular Lens Implantation in High Myopia with Cataract

Objective:To discuss the causes of low vision after phacoemulsification and foldable intraocular lens(IOL) implantation in high myopia with cataract. Methods:According to axial lengh,197 eyes with high myopia with cataract were divided into group A(26-30 mm,n=124) and group B(≥30 mm,n=73 eyes).The best corrected visual acuity ranged from LP to 0.15,and diopter was-8.00 D to-24 D before phacoemulsification and intraocular lens(IOL) implantation.All cases were followed up for 1 week to 12 months.Results:The percent uncorrected or corrected visual acuity ≥0.5 was 94.45% in group A versus 16.4% in group B.Posterior capsular rupture occurred in 1 eye(0.5%),high intraocular pressure in 6 eyes,posterior capsular opacity in 45 eyes(22.8%),and retinal detachment in 2 eyes.Nd∶YAG laser capsulotomy was performed in 7 eyes.Prophylactic laser treatment was carried out in 25 eyes.Conclusion:The main cause of the poor vision postoperatively is due to the pathologic changes of retinal in high myopia with cataract.Precisely calculating diopter of IOL,avoiding posterior capsular rupture,decreasing operative complications and prophylactic laser treatment in time are helpful for the protection of vision after the operation.