自然消失と再発を繰り返した液状後発白内障

Spontaneous disappearance and relapse of liquefied aftercataract posterior to the intraocular lens

　82歳女性が超音波乳化吸引術と眼内レンズ（IOL）の囊内挿入術による白内障手術を右眼に受けた。IOLはハイドロジェル製で，＋22Dであった。手術から12か月後にIOLと後囊の間隙に液状物が貯留し，前眼部画像解析装置（EAS-1000）で高い散乱光強度を示していた。貯留物はその3か月後に減少し，6か月後に自然消失した。さらにその6か月後に再発したが，その後，6か月後に消失した。術後の全経過を通じ，矯正視力は1.2であった。いわゆる液状後発白内障の1例であり，その診断と経過追跡に前眼部画像解析装置が有用であった。

A 82-year-old female received cataract surgery in her right eye by phacoemulsification-aspiration and intraocular lens（IOL）implantation. IOL was made of hydrogel and refraction of＋22 diopters. Twelve months after surgery,liquefied material was found in the space between IOL and posterior capsule. Anterior eye segment analysis system（EAS-1000）showed high density in the liquefied material. This material disappeared spontaneously 6months later. A similar finding recurred another 6months later to spontaneously disappear after 6months. Her corrected visual acuity remained unchanged at 1.2 throughout the postoperative period. This case was interpreted as liquefied after cataract. Anterior eye segment analysis system was useful in the diagnosis and follow-up of this condition.