Photophobia, also known as photophobia, is a condition in which the eyes are sensitive to light stimuli and are afraid to open their eyes. Once the cornea is damaged by lesions, such as corneal inflammation of various causes, corneal epithelial damage caused by various factors, corneal foreign bodies, corneal degeneration and malnutrition, the trigeminal nerve endings will be exposed, causing the eyes to be abnormally sensitive to external stimuli, and light stimulation will cause the phenomenon of photophobia. This can be accompanied by tearing, eye grinding or eye pain. Changes in the shape of the refractive system, such as the cornea and lens, can cause abnormal refraction of light entering the eye, resulting in glare and other phenomena that can cause photophobia, which is commonly caused by cone corneas, cataracts, posterior vitreous detachment, post-operative laser keratomileusis, and poorly positioned IOLs after cataract surgery. There are also other eye diseases such as iridocyclitis, glaucoma, retinopathy, etc. that can cause photophobia. Therefore, if you have photophobia, you need to go to the hospital for further examination to see what the specific cause is and then treat it symptomatically.