発症前から観察した家族歴のある遠視性不同視弱視の1例

Anisometropic amblyopia in an initially isometropic child with positive familial history

　症例は4歳1か月の女児。1歳9か月の時，調節麻痺剤点眼使用後，両眼4Dの遠視で，眼軸長は両眼とも約20mm,3歳時の視力検査にて両眼とも裸眼視力0.4であった。4歳1か月時の視力は右1.2（n．c．），左0.4（0.6）であり，調節麻痺剤点眼で右眼＋1.00D，左眼＋6.25D　cyl−0.25D Ax 133°，眼軸長は右22.40mm，左20.94mm，また眼位，眼球運動，両眼視機能は異常なかった。遠視矯正眼鏡と遮閉療法で左眼矯正視力は1.0に向上した。母親もほぼ同じ屈折度数の左眼遠視性不同視弱視があった。

A female infant showed bilateral hypermetropia of +4.0D under cycloplegics at one year of age. The axial length was 20mm each. When examined again at 4 years of age, cycloplegic refraction showed +1.0D in the right eye and +6.25D in the left. The axial length was 22.40mm in the right eye and 20.94mm in the left. Corrected visual acuity was 25/20 right and 20/30 left. Eye position and movement were normal. The left visual acuity improved to 20/20 after 3 months of wearing spectacles and occlusion of the right eye. Her mother showed anisometropic amblyopia in her left eye with essentially similar refractive state as the child.