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要約 目的:先天白内障に対する眼内レンズ(IOL)を用いた手術成績の報告。症例と方法:過去80か月間に手術を行った11例17眼を対象とした。男児7例11眼,女児4例6眼で,6例が両眼性,5例が片眼性であった。年齢は5か月~12歳(平均4.3歳)であり,全例に水晶体吸引とIOLの囊内固定を行った。16眼には後囊切開と前部硝子体切除を併用した。IOLの度数計算にはSRK-T式を使用し,2歳未満には+2D以上の遠視,6歳以上には正視を目標とした。結果:6か月以上,平均2年の経過観察でIOLの固定は全例で良好であった。術後1か月での屈折は,17眼中13眼(76%)が予想屈折の±1D以内の範囲にあった。最終屈折は,10眼(59%)が正視±1D以内の範囲にあった。合併症として後囊混濁が3眼,虹彩後癒着と前囊収縮が1眼に生じた。結論:先天白内障に対するIOL挿入の結果は良好であり,IOLの度数計算法もほぼ妥当であった。
Abstract. Purpose:To report the outcome of surgery for congenital cataract. Cases and Method:This review was made on 17 eyes of 11 cases who received surgery in the past 80 months. Six cases were bilaterally and 5 were unilaterally affected. The age ranged from 5 months to 12 years, average 4.3 years. All the eyes received aspiration of lens nucleus with in-the-bag fixation of intraocular lens(IOL). Sixteen eyes received posterior capsulotomy and anterior vitrectomy. IOL power was calculated by SRK-T formula. Hyperopia by 2 diopters or more was intended for cases under 2 years of age. Emmetropia was intended for those aged 6 years or over. Results:In all the eyes, IOL was well-fixated for 6 months or longer. One month after surgery, power of refraction was within ±1.0 diopter of predicted value in 13 eyes(76%). The final refraction differed by ±1.0 diopter from emmetropia in 10 eyes(59%). Three eyes showed opacity of posterior capsule and 1 eye showed posterior synechia with contracture of anterior capsule. Conclusion:Surgery with IOL implantation was safe and useful for congenital cataract by using our formula for IOL power calculation.
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