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Pterygium

is an abnormal proliferation of corneal margin caused by external stimulation, which may look like a flesh pimple growing in the corner of the eye.

2. Pterygium

xanthoma is a mass formed by lipid deposition in the eyelid, mainly related to lipid metabolism disorders and abnormalities.

3

. Chalazion

is an idiopathic chronic non-suppurative inflammation of the meibomian gland. Due to blockage of the meibomian gland outlet, secretion retention may be promoted, and cysts may form, leading to lumps in the eyelid.