Corneal surface

The conjunctiva of the palpebral fissure is congested and hypertrophic, and gradually stretches toward the corneal surface to form a triangle-shaped corpuscle with vascular tissue, which resembles insect wings, hence the name pterygium. It occurs mostly on the nasal side and less on the temporal side. When it reaches the cornea, it can invade the anterior elastic layer and the superficial stroma. The corneal surface triangular iliac meat is a clinical manifestation of pterygium. Pterygium is a common and frequently-occurring disease in ophthalmology. It is generally considered to be a chronic inflammatory lesion of localized bulbar conjunctival fibrous vascular tissue caused by external stimuli. It is triangular in shape and can invade the cornea, with unilateral or bilateral involvement. Because its shape resembles an insect's wings, it is called pterygium flesh, and Chinese medicine calls it "flesh flesh". It is one of the most common ophthalmic diseases in clinical practice and the oldest eye disease. Not only can it cause eye irritation and appearance defects, it can also affect vision to varying degrees. Occurs mostly in outdoor workers. May be related to long-term stimuli such as sand, smoke, sunlight, and ultraviolet rays.