Increased eye pressure – Can be the result of eye rubbing, sneezing, blowing your nose, heavy coughing, laughing or any kind of straining, as well as an injury to the head or eye. The “source” that sparks retinal stimulation can include: Seeing stars or phosphenes occurs when a source (other than outside light) stimulates the retina and/or optic nerve. While the response is a pretty cool phenomenon, rubbing your eyes can cause harm to the skin and muscles around the eye, as well as the eye itself. Many times, the phosphenes will continue to visibly float across the visual field a few moments after pressure on the eyes is released. This action stimulates photoreceptors inside the retina and causes the light and colors to appear. One or both eyes may be affected.Ī common practice that usually triggers phosphenes is eye rubbing. It may occur very quickly and resolve after a few moments, or could be a recurring feature in your vision. Undergoing phosphenes is called photopsia. Some people report that phosphenes look like rapidly moving stars, or shapes of color that wander slowly across your vision. Phosphenes are flashes of colorful light that are produced from inside the eye rather than from an outside light source. While phosphenes themselves are not considered dangerous, their persistence may indicate a more serious underlying issue that requires medical attention. People usually undergo phosphenes as a result of eye trauma, compression or inflammation of the optic nerve or friction against the retina. The light may appear as dots, squiggles, swirls or flashes with bright colors, which is why many refer to the experience as “seeing stars.” Phosphenes are visual phenomena that give the impression of seeing light without an actual light source.
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