What is the cause of eye pain?

Eye pain is usually caused by the following reasons: First, it is caused by keratitis. When infectious lesions appear in cornea, there will be obvious eye pain, accompanied by redness, tears, fear of light and other symptoms; Second, it is caused by electro-optic ophthalmia, which is generally caused by direct ultraviolet radiation or long-term strong light exposure to the eyes, as well as corneal epithelial burns caused by not wearing protective glasses when welding; The third is eye pain caused by ocular inflammation, such as iridocyclitis, uveitis and scleritis. Fourth, eye reactive pain caused by elevated intraocular pressure, such as acute glaucoma attack; Fifth, it is caused by corneal epithelial injury. For example, if sand enters the eyes, it will scratch the corneal epithelium and cause pain. I love you.