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Relationship of quantum of energy used and loss of corneal endothelial cell density following Nd:YAG laser capsulotomy for posterior capsular opacification

Poster Details

First Author: H.Chawla INDIA

Co Author(s):    M. Singh   S. Vashisht   K. Jain              

Abstract Details

Purpose:

Aim of this study was to evaluate change in corneal endothelial cell density (CD) following Neodymium: Yttrium Aluminum Garnet (Nd:YAG) capsulotomy among patients with posterior capsular opacification (PCO).

Setting:

Department of Ophthalmology, PGIMER and Dr. Ram Manohar Lohia Hospital, New Delhi, India

Methods:

A prospective observational study was conducted on 181 eyes that underwent Nd:YAG posterior capsulotomy. One hundred and fifty six patients completed the study. Patients were grouped, depending on quantum of energy used, into Group A (≤ 40 mJ), B (40 - 80 mJ) and C (> 80 mJ). Corneal endothelial density was recorded prior to laser, at one week and one month post laser.

Results:

Average duration since surgery was 2.45 years. Average total energy used was 56.23 mJ. Mean fall in CD from baseline at 1 week was 0.3 ± 0.35% in Group A (p= 0.196), 0.4 ± 3.6% in Group B (p= 0.043) and 1.5 ± 5.4% in Group C (p = 0.001). At 1 month, fall in CD was 0.4 ± 0.9% (p=0.761), 0.5 ± 6% (p=0.005) and 2.0 ± 5.6% (p= < 0.001) respectively. Thus fall in CD was observed only in groups that received > 40 mJ of energy and was higher with use of higher amount of energy.

Conclusions:

Loss of endothelial cells is proportional to quantum of energy used to achieve optimum Nd:YAG laser capsulotomy and does not change significantly over a period of one month.

Financial Disclosure:

NONE

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