COMPARATIVE STUDY OF VISUAL OUTCOME OF EARLY VERSUS DELAYED PARS PLANA VITRECTOMY IN PATIENTS COMPLICATED WITH DROPPED NUCLEUS DURING PHACOEMULSIFICATION

Purpose: To evaluate the controversy of early and delayed pars plana Vitrectomy (PPV) forposteriorly dislocated lens fragments after phacoemulsification. Patients and Methods: AProspective study was conducted on all consecutive cases (30 patients) with parsplanaVitrectomy performed for retained lens fragment. In first group: 15 eyes (50%), PPV wereperformed within 1 week of cataract extraction and in second group 15 eyes (50 %), PPV wereperformed more than 1 week post cataract extraction from January 2016 to November 2017.Results: In the first group, 67 % of the patients had a final Visual acuity of 0.3 or better, but27% of them achieved a final Visual acuity of 0.5 or better. The mean improvement of Visualacuity in the 1st week was 0.13 ±0.14, in one month 0.18 ±0.16, 0.28 ±0.21 in the 3rd month and0.37 ±0.23 at the end of the 6th month .In the second group, 34 % of the patients had a finalVisual acuity of 0.3 or better, but 14% of them achieved a final Visual acuity of 0.5 or better. Themean improvement of Visual acuity in the 1st week was 0.09 ±0.07, in one month 0.14±0.09,0.19±0.13 in the 3rd month and 0.24±0.17 at the end of the 6th month. Conclusions: The visualoutcome of the first group in our study is better than that of the second group but with nostatistical significance (P value more than 0.05), the results did not indicate an associationbetween clinical outcomes and whether the patient had an early or delayed PPV, However,there was evidence that early PPV may produce better outcomes than delayed PPV.