It is intended for screening purposes rather than for the in-depth study of a color vision defect.

它只是用来说明显示的目的，而不是用来深入研究彩色视觉的缺陷。

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A very small number of cases, this may be accompanied by a group of flash-bucks and some vision defect there.

极少数的情形下，这种闪光可伴随著一群飞蚊及部分视野缺损出现。

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All symptoms such as defect of vision field, hemiopia etc were improved.

术后视野缺损、偏盲等症状均有改善。

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