Suddenly you can’t see anything because of the bright light stimulation, retinal contusion or neurological lesions, etc. When strong light suddenly stimulates your eyes, it will cause a large amount of photoreceptors in the retina to be depleted for a short period of time, resulting in blurred vision. When strong light suddenly stimulates the eyes, it will lead to a large amount of photoreceptors in the retina for a short period of time, thus causing the patient to see things blurred, that is to say, the retina appeared to adapt, at this time the patient as long as the rest for a period of time, the photoreceptors on the retina will quickly synthesize, so as to restore the eyesight. If the eye trauma impacts the retina inside the eyeball and causes retinal contusion, it will lead to a short period of intense flash sensation and cause vision loss, and the patient needs to go to the ophthalmology department of the hospital in a timely manner, and promote the recovery of vision through the use of neurotrophic drugs and other treatments. If the patient’s nervous system has a disease that affects the visual center, it may also cause symptoms such as flashes of light and loss of vision, and requires a neurological consultation to find out the cause and treatment.