Crevice corrosion refers to the attack of metal surfaces by a stagnant solution in crevices, for example in nuts and rivet heads. When dust, sand and other corrosive substances are deposited on surfaces, they create an environment where water will accumulate and corrode the part. It can happen between two metals or between a metal and a nonmetal.
he said he hasnt really seen someone who's eye has been constantly pulsing like mine had. it usually comes and goes but for some reason mine is continual. he said stress fatigue and caffeine are the main causes but i dont know.. he said i should see a neurologist because the consistency of it makes him worried.
The large cavity of the eye is filled with a jelly like substance called vitreous. When we are born it is attached to the back surface of the eye, the retina. As we age the vitreous shrinks. So at some point it has to separate from the retina. This can irritate the retina and cause flashing lights. It can also result in floating spots in our vision. This is because the vitreous surface that was against the retina is now floating in the center of the eye casting a shadow. Most of the time (99+%) this does not cause a problem.