片眼無水晶体例における両眼視機能について

Binocular function in unilateral aphakia

　片眼性無水晶体症90例について，不等像視，立体視機能を測定した．

　人工水晶体移植例（N＝57）において，不等像視の平均値は2.8％であり，3％以下の不等像視を示したものが39例（68.4％）であった．また立体視機能については，チトマステストにおいてサークル5／9（100sec）以上の良好な立体視を示したものは38例（66.7％）を示した．

　コンタクトレンズ装用群（N＝27）においては不等像視の平均値は4.9％であり，3％以下のものは11例（40.8％）であった．また5／9以上の立体視を示したものは，同じく11例（40.8％）であった．

　眼鏡で矯正すると（N＝6）不等像視は平均16.5％となり，立体視機能は，低い値を示した．

We evaluated the binocular function in subjects with unilateral aphakia or pseudophakia. The aniseikonia and stereopsis were evaluated with the patient wearing contact lens or ordinary eyeglasses whenever necessary. The degree of aniseikonia was measured with the new aniseikonia test developed by Awaya. The stereopsis was measured with the Titmus Wirth test.

In the group corrected with intraocular lens (N = 57), the mean value for aniseikonia was 2.8% and the stereopsis was 5.16 on the Titmus circle. In these57), the mean value for aniseikonia was 2.8% and the stereopsis was 5.16 on the Titmus circle. In these 57 subjects, 39 subjects showed aniseikonia of 3.0% or less which is considered to be the limit of toler-ance. The stereopsis was 100 sec, or better in 38 subjects.

and the stereopsis was 3.70 on the Titmus circle. In 11 subjects, aniseikonia was 3.0% or less. Stereopsis was 100 sec, or better in 11 subjects.

In the group with aphakia corrected by ordinary glasses (N =6), the mean value for aniseikonia was 16.5%. Fine stereopsis was obtained in none.

These findings indicate that intraocular lens im-plantation is the most effective means to achieve postoperative binocular function in unilateral apha-kia.

Rinsho Ganka (Jpn J Clin Ophthalmol) 41(5) : 438-442, 1987