All the light that reaches our eyes stimulates substances in a protein called purple or retinal Rhodopsin.Specifically, their molecules react decomposing, giving rise to an electrical impulse that is transmitted to the brain via the optic nenio.
If the brightness is normal, our retinas have enough rodopsina to function smoothly.
By contrast, when a flash is affected by photographic or other overdose photon-like the one that occurs to look directly at the sun, these molecules stimulate the photochromic nenio excess, which produces a saturation point.
The blindness is, therefore, the time spent in the back of retinal purple fogonazo.
