1) 유색가토에서는 술후 30분경 안압이 가장 많이 상승하였고 무색가토에서는 술후 안압의 변화가 없었다.
2) 유색가토에서 장시간조사방법이 단시간조사방법에 비하여 안압이 더 많이 상승하였다.
4. Argon 레이저홍채절제술후의 홍채염의 정도
1) 유색가토에서는 술후 1일에 홍채염이 가장 심하게 나타났으며 무색가토에서는 술후 홍채염이 나타나지 않았다.
2) 유색가토에서 장시간조사방법이 단시간조사방법에 비하여 술후의 홍채염이 더 심하게 나타났다.
[영문]The transient change of intraocular pressure following argon laser iridotomy in rabbits
Kwan Sik Kim
Department of Medical Science The Graduate School Yonsei University
(Directed by Professor Ouk Choi, M.D.)
The use of focused light energy in the anterior segment for glaucoma therapy has been attributed to Meyer-Schwickerath, who performed iridotomies using a Zeiss light (xenon arc) coagulator in 1956.
Since that time several procedures and energy sources have been developed th aid in the therapy of glaucoma. Although the xenon arc did succeed in making iridotomies, the excessive heat ant dispersion of pigment limited the value of this technique.
Argon laser photocoagulation has been used successfully in the eye since its first clinical trials in 1968 in the treatment of various chorioretinal diseases.
During the past few years the argon laser has become an increasingly used modality for the treatment of primary and secondary angle closure glucoma. But, some poorly defined complications remain including the laser's effect on the lens
and intraocular pressure etc.
In this study, the transient change of intraocular pressure followed by argon laser iridotomy was observed in the pigmented and non-pigmented rabbits.
The results were as follow :
1. The number of application of argon laser required for successful iridotomy. The longer the duration of argon laser, the less was the number of application. In the pigmented rabbits, the mean number of application was 194 for long burn technique and 942 for short burn technique.
2. The relationship between the peak intraocular pressure and the laser energy in argon laser iridotomy.
1) The range of peak intraocular pressure followed by argon laser iridotomy was from 8 to 24 mmHg and the range of laser energy was from 12 to 53 Joule.
2) No significant relationship was noted between the laser energy and the intraocular pressure followed by argon laser iridotomy.
3. The change of intraocular pressure followed by argon laser iridotomy.
1) In the pigmented rabbits, the peak intraocular pressure was at 30 minutes after argon laser iridotomy, whereas intraocular pressure was not changed in the non-pigmented rabbits.
2) In the pigmented rabbits, intraocular pressure was higher in the long technique than in the short burn technique.
4. The degree of iritis followed by argon laser iridotomy.
1) In the igmented rabbits, iritis was most prominent at rabbit, postlaser iritis was not found.
2) In the pigmented rabbits, iritis was severer in the long burn technique than in the short burn technique.