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So whether there is light entering the eye or not, any stimulation of the retina will be translated into a light show by the brain. If you see stars or flashes after sneezing, it could be from a pressure on the eye itself, or from stimulation of the nerves that have to do with sight.
Causes, incidence, and risk factors. People are able to see because the front part of the eye bends (refracts) light and points it to the back surface of the eye, called the retina. Nearsightedness occurs when the physical length of the eye is greater than the optical length.auses, incidence, and risk factors. People are able to see because the front part of the eye bends (refracts) light and points it to the back surface of the eye, called the retina. Nearsightedness occurs when the physical length of the eye is greater than the optical length.