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Do you see those strange flashes when you close your eyes? Then that could be a problem!

Do you see those strange flashes when you close your eyes?  Then that could be a problem!

To this day, our most basic and sensitive sensory organ hides many secrets, the mapping of which provides a continuing occupation for researchers. Now they are investigating why we see strange shapes when we close our eyes and rub them.

Katrina Schmid, an associate professor in the School of Optometry and Vision Sciences at Queensland University of Technology, wrote in an article for The Conversation that most people experience harmless “visual hallucinations” with their eyes closed, which Our eyes Consequences of its normal operation.

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These are called phosphenes, a type of light sensation, which are internal signals produced by our eyes that mimic light and are emitted by cells at the back of our eyes. They can also be coloured, because the color-sensing cells in our eyes can also show activity. Interestingly, our brain doesn't know that these objects are not created by real light, so it can look like some kind of illusion.

The phosphine phenomenon also often occurs when we suddenly move from a bright environment to a dark environment. This is because the photoreceptors in the retina adapt to changes in light more quickly than usual.

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This often occurs in the absence of natural light, and can be caused deliberately, for example by rubbing our eyes, but can also be caused by eye strain, strong light effects or rapid eye movements. Generally, these are harmless phenomena, but Schmid explained that changing patterns and becoming more pronounced “can also indicate a problem.”

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But if it appears suddenly and lasts for a long time, this is due to damage to the retina, or it is neurological It can also indicate diseasesBut don't be afraid, to some extent it's completely normal.

Source: IFL Science

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