真性胬肉多发生于内外眦部,与周围的组织粘连是全面性的,可侵犯角膜基质层,是进行性的,胬肉呈鲜红色,血管为扩张状态。是变性组织,原因不明。假性胬肉可发生于任何部位,粘连有时只限于头部,侵犯角膜浅层,是静止性的,胬肉呈淡红色,血管为萎缩状态,是结缔组织疤痕。 True pterygium mostly occurs in the Department of internal and external Department of Department, with the surrounding tissue adhesion is comprehensive, can invade the corneal stroma, is progressive, bright red pterygium, blood vessels for the expansion state. Is a denaturing organization for unknown reasons. Fake pterygium can occur in any part of the adhesions sometimes confined to the head, the invasion of shallow cornea, is static, flesh was pale red, vascular atrophy, is a connective tissue scar.