如果你的视力不好，你应该避免在夜间开车。

If your ___sight is poor, you should avoid driving at night.

他在一次童年事故中失去了视力。

He lost his ___sight in a childhood accident.

医生不确定她视力的损伤是否是暂时的。

Doctors were unsure if the damage to her ___sight was temporary.