虹彩

1. 畏光，羞明对光线不正常敏感或无法忍受，尤指由眼引起的，可能是由眼炎、眼球虹彩中缺少色素或其它疾病而引起的
   An abnormal sensitivity to or intolerance of light, especially by the eyes, as may be caused by eye inflammation, lack of pigmentation in the iris, or various diseases.

彩的英语翻译：