Acquired color deficiency获得性色觉缺陷

Some changes in color vision occur throughout life even in healthy individuals. These changes can be explained in terms of yellowing of the ocular media and perhaps changes in retinal sensitivity. Color vision deficiencies can arise at any time throughout life as a result of general or ocular disease, trauma, medication or as a result of exposure to toxic substances. Unlike congenital color deficiencies, acquired defects commonly affect one eye only and affect males and females equally.

即使在健康人的一生中，色觉也会发生一些变化。 这些变化可以用眼部介质变黄和视网膜敏感度的变化来解释。 由于全身或眼部疾病、外伤、药物治疗或接触有毒物质，在一生中的任何时候都可能出现色觉缺陷。 与先天性颜色缺陷不同，获得性缺陷通常只影响一只眼睛，对男性和女性的影响相同。

The effects of various diseases on color vision has only been fully recognised in recent years. This is partly because acquired defects often affect blue perception and most color vision tests only screen for red-green defects.

各种疾病对色觉的影响直到近几年才得到充分认识。 这部分是因为获得性缺陷通常会影响蓝色感知，并且大多数色觉测试仅筛选红绿色缺陷。