The pterygium is a clinical condition that occurs in patients who have long-term outdoor exposure to wind and sand, bright light, visual fatigue, spicy and irritating diets, and chronic inflammation, and may be related to exogenous stimuli such as ultraviolet radiation, smoke, and chronic inflammation of the eye. The damage to the stem cells of the corneal limbus and the loss of the barrier, and the subsequent proliferation of the pterygium, will not have a significant effect on vision in the early stages, but over time, fibrovascular tissue may form under the bulbar conjunctiva, forming a triangular pterygium infiltrating the cornea, which requires surgical treatment to remove.