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High risk of late intraocular lens dislocation after cataract surgery using phacoemulsification: analysis of national health insurance cohort data from 2009 to 2016

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Session Details

Session Title: IOL Dislocation & Opacification

Session Date/Time: Tuesday 25/09/2018 | 14:00-16:00

Paper Time: 14:12

Venue: Room A3, Podium 1

First Author: : D.Lim SOUTH KOREA

Co Author(s): :    J. Han   G. Lee   T. Chung              

Abstract Details


To determine the incidence of intraocular lens (IOL) dislocation in South Korea and evaluate the risk of late IOL dislocation after cataract surgery in a population-based cohort.


A nationwide, population-based, retrospective study of IOL dislocation in the entire South Korean population (n=51,307,821) from 2009 to 2016 was conducted using data from the Korean Health Insurance Review and Assessment (HIRA) database.


We identified patients with ophthalmologist-confirmed IOL dislocation after cataract surgery using the HIRA database, and estimated incidence rates and risk factors overall and according to age and sex. The risk of IOL dislocation was estimated by using the Kaplan-Meier method and Cox regression models.


Of 51,307,821 subjects, 2,162,280 over 40 years of age underwent cataract surgery. Most of the cases were phacoemulsification. Among the pseudophakia, 18,817 (0.87 %) underwent scleral fixation because of late IOL dislocation. Mean duration from the cataract surgery to secondary IOL fixation was 4.31 ± 2.21 years. Overall incidence rate of IOL dislocation was 2,389/1,000,000 person-year. Old age at cataract surgery, vitrectomy, uveitis, trauma and atopic dermatitis significantly increases the risk of IOL dislocation. (P < 0.0001) Social economic status and sex did not increase the risk.


This representative large sample cohort study revealed earlier and higher incidence rate of secondary IOL fixation after cataract surgery mostly using phacoemulsification from 2009 to 2016, compared to the previously reported studies. The possibility of IOL dislocation should be presented at cataract surgery, especially to the patients with risk factors.

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