Moonbows appear on the opposite side of the moon and usually look white to the human eye.
月虹出现在月亮的另一侧，它们在人眼中通常看起来是白色的。
2
Pterygium: a white or creamy fleshy growth on the surface of the eye;
翼状胬肉：眼睛表面的一种白色或乳脂肉质生长；
3
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.