Light perception is the lowest level of vision standard, if there is no light perception, it means that the eye is blind, no light perception occurs in serious eye trauma, or serious eye disease, if the eye rupture injury occurs, with retinal detachment, after surgery suture, can make the eye retina basic reset, visual function has irreversible damage, there will be no light perception. Intracranial tumor compression or long-term glaucoma, high intraocular pressure causes atrophy of the optic nerve and complete loss of optic nerve function after a long period of time, which may also lead to loss of light perception, age-related macular degeneration in the fundus of the elderly, when the function of the macular area is more severely damaged, there will be repeated bleeding and absorption to form scarring, which will seriously affect vision and form lightlessness. Blockage of the central retinal artery in the fundus, sharp loss of vision in a short period of time, or even no light perception. The appearance of no light perception in the eye is usually caused by the appearance of a more complicated eye disease.