无色视觉

例句：

1. 1. Achromatism is a condition in which the individual cannot distinguish between colors.
   色盲是一种个体无法区分颜色的状况。
2. 2. The patient was diagnosed with achromatism and required special training to cope with his environment.
   患者被诊断为色盲，需要特殊的训练来适应他的环境。
3. 3. In some cases, achromatism can be caused by genetic factors or environmental exposures.
   在某些情况下，色盲可能是由遗传因素或环境暴露引起的。