The Exerimental Study on Possibility of Development of Lenticular Opacity after Argon Laser Retinal Photocoagulation.

Han, Hong Ju; Park, Cheon Kyu

Original Article

Journal of the Korean Ophthalmological Society 1988;29(5):829-833.
Published online May 1, 1988.

The Exerimental Study on Possibility of Development of Lenticular Opacity after Argon Laser Retinal Photocoagulation.

Hong Ju Han, Cheon Kyu Park

Department of Ophthalmology, College of Medicine, Chonbuk National University, Chonbuk, Korea.

아르곤레이저 망막광응고술에 의한 수정체혼탁의 발생 가능성에 관한 실험적 연구

한홍주(Hong Ju Han),박천규(Cheon Kyu Park)

Abstract

Lenticular bum can occur as complication after laser iridotomy or retinal photocoagulation. Some authors have, indeed, reported the cases in which focal lenticular opacity developed after laser iridotomy or retinal photocoagulation. Fortunately, it was not progressive in short-term follow up study. When argon laser beam penetrates ocular media, a portion of it is absorbed by lens. So visible lenticular opacity is not developed after argon retinal photocoagulation if lens is clear. But it is not known whether subclinical lenticular opacity can occur after argon laser retinal photocoagulation. We focused argon laser beam onto anterior lens capsule in 35 black and brown rabbit and evaluated development of subclinical lenticular opacity with densitometer 1 and 8 weeks later. We also analyzed lens protein 1 week later. Argon laser energy used was below 20 Joules. The following results were obatined. 1. Lenticular opacity was detected by densitometer in all cases, but it was not detected by slit-lamp. 2. Amount of lenticular opacity was in direct proportion to argon laser energy(p<0.001). 3. Lenticular opacity detected on the 1st week by densitomer was not detectable on the 8th week. 4. The lens protein changes of senile cataract were not found in the lenticular opacity detected on the 1st week.