自己閉鎖創白内障術後早期の視機能

Contrast visual acuity during early stages after smallincision cataract surgery

　自己閉鎖創小切開白内障術後早期の視機能を評価する目的でvariable contrast visual acuity charts（VCVAC）を用いてコントラスト視力を測定し，これに影響すると考えられる前房内炎症をレーザーセルフレアーメーターで，角膜厚をパキメーターで測定した。高コントラスト視標における矯正視力は術後3日目に安定したが，中〜低コントラスト視標では術後5日目に安定した。これはフレア値が術翌日最高で，術後5日目で安定する傾向と一致していた。また角膜厚は術前，術翌日，術後3〜5日目で有意な差がなかった。

We evaluated 29 eyes of senile cataract which underwent phacoemulsification and aspiration with intraocular lens implantation. The size of corneal incision was either 3.2mm (4 eyes) of 5.5mm (25 eyes) . Contrast visual acuity was measured using the variable contrast visual acuity charts by Wang and Pomerantzeff. A laser flare meter was used to quantitate the intraocular inflammation. Corneal thickness was measured by a pachometer. These measurements were made before surgery and 1, 3, 5 days, 2 weeks and one month after surgery. The aqueous flare showed its peak one day after surgery to stabilize after 5 days after surgery. Visual acuity measured by the high-contrast charts recovered 3 days after surgery. Visual acuities measured by intermedi-ate- to low-contrast optotypes showed improvements 5 days after surgery. The improvement in visual acuity with intermediate- and low-contrast charts was negatively correlated with the level of intraocular inflammation. There was no significant difference in corneal thickness before and after surgery.