High altitude hypoxia has effects on visual function, for example, dark adaptation time prolonged, vision decreased, color vision decreased, severely retinal hemorrhage. Retinal damage at high altitude is called high-altitude retinopathy(HAR).

• 对视觉的影响主要表现在:暗适应时间延长,视力下降,色觉减退,甚至出现视网膜出血,引起高原视网膜病(high-altitude retinopathy,HAR)。