王××,女,16岁。10岁时发现双眼交替外科,无头痛,复视,无外伤史,无阳性家族史。视力右0.4/1.5,矫正-0.75DS=-0.5DC×180°→1.5;左1.5/1.5。无代偿头位,眼球由第一眼位向第二、第三眼位转动时无受限。侧方注视时出现眼球水平震颤,持续30秒消失,快相向注视侧。交替遮盖试验:两眼均内转。单眼遮盖与除遮盖试验:遮盖眼处于外斜位,除遮盖双眼均不动。用角膜映光法测得 Wang × ×, female, 16 years old. 10 years old found alternating eyes surgery, no headache, diplopia, no history of trauma, no positive family history. Right vision 0.4 / 1.5, correction -0.75DS = -0.5DC × 180 ° → 1.5; left 1.5 / 1.5. No compensation for the first bit, the eye from the first eye to the second, third eye rotation without restriction. Eye side tremor appears when the side of the eye, disappeared for 30 seconds, fast side to the gaze. Alternate cover test: both eyes were internal transfer. Monocular cover and in addition to cover test: cover the eyes in the oblique position, in addition to cover both eyes do not move. Measured by corneal reflectometry