DEAFNESS AND HEARING LOSS; BLINDNESS OR VISION LOSS.

失聪和听力下降；失明或视力下降。

Delaying care could lead to permanent vision loss or blindness.

推迟治疗可能会导致永久的视力损伤或者致盲。

Symptoms may be very slight red eyes, it can also be a serious vision loss.

症状可能是很轻微的眼睛红，也可以是严重的视力减退。

The vision loss from a cataract often happens slowly and may never become severe.

白内障所引起的视力减退是一个相当缓慢的过程，而且这种视力减退可能并不会十分严重。

Retinal diseases can cause severe vision loss or blindness if left untreated.

视网膜疾病，如果任其不治的话，可能引起严重的视力减退或失明。