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1日1回のラタノプロスト点眼で眼圧が下降しない無効例(ノンレスポンダー)を88例88眼について検索した。内訳は原発開放隅角緑内障22例,正常眼圧緑内障43例,高眼圧症23例であり,点眼開始から1,3,6か月後の眼圧値と眼圧下降率を測定した。眼圧下降率が10%未満のものをノンレスポンダーと定義し,眼圧下降率に寄与する因子を重回帰分析で検討した。眼圧は,点眼開始前19.4±4.2mmHg,1か月後15.3±3.4mmHg,3か月後14.9±3.3mmHg,6か月後14.7±2.9mmHgであった。点眼開始から6か月までの眼圧下降率は20.2~23.5%で,有意に眼圧が下降していた(p<0.0001)。点眼開始前の眼圧のみが眼圧下降率と有意に関連していた(p=0.0019,R2=0.20)。ノンレスポンダーの頻度は,1か月後20.9%,3か月後18.2%,6か月後14.3%であり,点眼開始前の眼圧が低い症例に多かった。
We evaluated the rate of intraocular pressure reduction in 88 eyes of 88 patients who received latanoprost intillation once daily. The series comprised 22 cases of primary open-angle glaucoma,43 cases of normal tension glaucoma,and 23 cases of ocular hypertension. The intraocular pressure(IOP)averaged 19.4±3.3 mmHg before start of instillation,15.3±3.4 mmHg after 1 month,14.9±3.3 mmHg after 3 months,and 14.7±2.9 mmHg after 6 months. The IOP reduction was significant(p<0.0001),with the rate of IOP reduction ranging from 20.2% to 23.5%. IOP before start of instillation was the sole significant factor related to the rate of IOP reduction(p=0.0019,R2=0.20). Latanoprost responder was defined as those manifesting less than 10% of IOP reduction. Its incidence was 20.9% at 1 month,18.2% at 3 months,and 14.3% at 6 months of instillation. Latanoprost nonresponders were more frequent among those with low IOP before start of instillation.
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