vision impairment的用法和樣例：
例句
- Age-related macular degeneration is the leading cause of visual impairment and blindness among the old people.
老年性黃斑變性是老年人最主要的視力損傷和致盲原因之一。 - Optic nerve avulsion is a rare globar injury, which usually results in permanent and devastating loss of vision.
摘要視神經撕除是一種罕見的傷害，這種傷害通常會造成永久且嚴重的視力損傷。
