Jin-woo Kwon

Purpose:
To report causes of progressive zonulysis byanalyzing 19 cases of spontaneous late dislocation ofIOL into vitreous cavity after cataract surgery.

Method:
We retrospectively reviewed 19 cases of latespontaneous dislocation of posterior chamber IOL inthe capsular bag. Data analyzed were patients’ medicalrecords including patient’s age at cataract operation,sex, ocular medical history, axial length, manifestrefraction if checkable, phaco-power and time, types oflens opacity, intraocular lens materials, duration fromcataract surgery to dislocation of lens, perform of Yagposterior capsulotomy, and development of complica-tion after vitrectomy

Results:
The prevalence was as 0.11%. Male andfemale prevalence was 0.24%, 0.01% respectively.Mean age was 44.89 years old. IOL materials usedincluded 13 one-piece PMMA, 3 one-piece hydrophilicacrylic lens in this study. Average phaco-power andtime was 40% and 66.2sec respectively. Axial lengthwas 25.62 mm and an average of ?6.94 diopter wasmeasured in 11 cases that had preoperative manifestrefractions. There were 8 cases of anteior polar cataract(APC), 3 cases of nucleosclerosis, 2 cases of corticaltype, 5 cases of mixed type, and 1 case of mature type.Medical history showed 1 case of hypertension and 1case of diabetes mellitus. Average time from cataractsurgery to lens dislocation was 158.53 months.

Conclusion:
This study reveals that the type of cata-ract, age at cataract operation, sex, and myopia may bethe risk of late spontaneous dislocations of IOL byinducing zonulysis in Korean people. We find outmale, younger cataract patients, APC patients showedmore complication of dislocated lens.