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点眼のみでは眼圧調整不能の原発性開放隅角緑内障に対し,同一条件のもとで,25眼に赤色クリプトン,110眼に青緑混合アルゴン,14眼に緑色アルゴンレーザーを用いてトラベクロプラスティ(LTP)を行った.
(1)赤色クリプトンLTP施行24時間後の眼圧下降は平均4.8mmHg,1カ月後は平均2.3mmHgで未だ有意なるも,3カ月後には眼圧下降効果は全く認められなかった.これに対し,アルゴンLTPでは24時間後,1カ月,3カ月,またはそれ以降も平均7.0〜8.2mmHgの眼圧下降であり,アルゴンに較べてクリプトンLTPの効果は明かに劣った.
(2)青緑混合アルゴンと緑色アルゴンレーザーの間には,眼圧下降,トノグラフィーC値改善効果に差を認めなかった.
(3)角膜混濁などで通常の青緑混合アルゴンレーザー透過困難な症例では,赤色クリプトンではなく緑色アルゴンレーザーを使用すべきである.
Laser trabeculoplasty was performed on eyes with uncontrolled primary open angle glaucoma. Red krypton laser was used for 25 eyes, conventional mixed -wavelength argon laser for 110 and pure argon laser for 14 eyes. The technique of laser application was the same. The state of glaucoma were identical for each of the three groups.
The reduction in intraocular pressure after the treat-ment with red krypton laser was 4.8 mmHg at 24 hours, 2.3 mmHg at one month and zero at three months.After treatment with argon laser, the reduction in intraocular pressure was significantly greater for each period. It averaged 7.0 to 8.2 mmHg up to 12 months. There was no difference between mixed and. pure green argon laser as regards intraocular pressure reduction and improve-ment in the facility of outflow.
Rinsho Ganka (Jpn J Clin Ophthalmol) 40(8) : 977-979,1986
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