It is caused by damage to the blood vessels in the eyes, and results in gradual vision loss and blindness.

它是由眼睛血管受损引起的，会导致视力逐渐丧失和失明。

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DEAFNESS AND HEARING LOSS; BLINDNESS OR VISION LOSS.

失聪和听力下降；失明或视力下降。

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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。

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The disease can cause permanent vision loss unless the patient gets an intensive eye surgery.

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