Humans also happen to have scleras-the white part of the eye surrounding the iris-that are much bigger and brighter than the scleras of other primates.
与其他灵长类动物相比，人类在虹膜周围恰恰拥有更大，更明亮的白色巩膜。
Greene went to an ophthalmologist, who told her she had developed a pterygium, a non-cancerous growth that forms on the clear, thin tissue that covers the white part of the eye.
格林去看了一名眼科医生，对方对她说她得了“翼状胬肉”，这是一种发生于覆盖在眼白上方的透明薄层组织上的非癌性的增生。
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