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要約 目的:本研究は,急性緑内障発作眼の僚眼の予防的な超音波水晶体乳化吸引術および眼内レンズ挿入術(PEA+IOL)における目標屈折度と術後屈折度の評価を目的とした。
対象と方法:急性緑内障発作眼の僚眼にPEA+IOLを施行した症例を対象として,眼軸長,前房深度,水晶体厚,術前後の角膜曲率半径,術前後の眼圧,目標屈折度および術後屈折度を調査した。
結果:34例34眼(男性:12例12眼,女性:21例21眼)が解析対象となり,平均眼軸長(±SD)は22.49(±1.18)mmで短軸眼(<22mm)は8眼(24.2%),平均前房深度は2.40(±0.37)mm,平均水晶体厚は5.02(±0.48)mmであった。平均目標屈折度は−0.469(±0.479)D,平均術後屈折度は−0.517(±0.902)Dで,両者に有意な差はなかった(p=0.6967)。平均角膜曲率半径は術前7.65(±0.28)mm,術後7.67(±0.25)mmで,術前後で有意な差はなかった(p=1.000)。平均眼圧は術前の14.2(±4.5)mmHgから術後は12.4(±3.0)mmHgに有意に低下した(p=0.0082)。術後の平均観察期間5.0か月時点において,眼圧の再上昇はなかった。
結論:急性緑内障発作眼の僚眼に対する予防的な白内障手術は外科的処置の第一選択になりうる。
Abstract Purpose:To evaluate the refraction after prophylactic surgery for fellow eyes with acute glaucoma attack.
Cases:This study was made on 33 cases who received prophylactic phacoemulsification(PEA)and intraocular lens implantation(IOL)after acute glaucoma attack in fellow eyes. The series comprised 12 males and 11 females. Surgery was made with the target refraction of −0.469D. Eyes that received cataract surgery showed axial length of 22.49±1.18 mm. Eight eyes(24.2%)showed axial length shorter than 22 mm. The anterior chamber depth averaged 2.40±0.37 mm. The thickness of crystalline lens averaged 5.02±0.48 mm.
Findings and Clinical Course:Refraction after cataract surgery averaged −0.517±0.902D. There was no significant difference from the target value(p=0.6967). Diameter of corneal curvature averaged 7.65±0.28 mm before surgery and 7.67±0.25 mm after surgery. There was no significant difference between the two values(p=1.000). Intraocular pressure averaged 14.2±4.5 mmHg before surgery and 12.4±3.0 mmHg after surgery. The latter value was significantly lower than the former(p=0.0082). No eye showed pathological IOP increase during observation for 5 months after surgery.
Conclusion:Prophylactic cataract surgery may be the first choice for fellow eyes with acute glaucoma attack.
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