If left untreated, the disease can lead to completeblindness as the color-sensing cells in the retina slowly degenerate.
如果不及时进行治疗,视网膜中的色素感光细胞漫漫地变性坏死,最终会导致患者失明。
2
Without a training period, the regained visual functions enabled him to localize and approach persons in a room freely and to read large letters as complete words after several years of blindness.