People with the disease usually start losing their sight before they are 18. This often progresses to total blindness.

这种疾病的患者通常在18岁之前会丧失视力，这往往会导致彻底失明。

It also seems that people with total blindness still react to light.

似乎完全失明的人仍然对光有反应。

Total blindness refers to the complete inability to see anything with either eye.

完全失明是指完全无法用任何一只眼睛看到任何东西。

A recent study was done where participants with total blindness were able to correctly determine when a blue light was on or off.

最近进行的一项研究表明，完全失明的参与者能够正确确定蓝灯何时亮起或熄灭。

Rosalie had developed a condition known as Charles Bonnet Syndrome, in which patients with either impaired vision or total blindness suddenly hallucinate whole scenes in vivid color.

罗萨莉患有邦纳症候群，患者通常视觉受损或是完全丧失视觉，眼前却突然出现色彩缤纷的各种幻觉。

While it can be difficult to exactly know what another person experiences, there are different perceptions that have been reported by individuals with total blindness.

虽然很难确切地知道另一个人的经历，但完全失明的人报告了不同的看法。

People with the disease usually start losing their sight before they are 18.This often progresses to total blindness. The gene that causes the disease could suddenly appear when a child is born with a copy of the gene from both parents.

患有这种疾病的患者通常会在18岁前丧失视力，通常会逐渐完全失明。当孩子遗传了来自父母双方的这种致病基因时，这种基因可能会突然显现。