除1例诉复视外，21例患者无双眼视障碍的症状，无严重并发症发生。

One patient complained diplopia, and the other 21 patients did not complained any symptoms according to binocular disorders. No cases of severity complication were found.

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双眼视功能受损中，双眼同时视障碍为2 .1% ，双眼融合视缺失为4.3% ，而双眼定性立体视丢失为16 .7%。

For binocular visual function, 2.1% had a disturbance in binocular simultaneous perception, 4.3% had defective binocular fusion, and 16.7% had a qualitative stereopsis loss.

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结论：5 0岁以上者出现视力下降、视野缺损，特别是双眼同向性偏盲，若排除其他疾患，则可能是脑底动脉粥样硬化引起外侧膝状体血供障碍所致。

Conclusions: Excluding other diseases, the eyesight decline, visual field defect in patients over 50 years old were caused possibly by atherosclerosis of the arteries at the base of the brain.

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