Why does staring at something bright leave a black spot on your vision even when you close your eyes, and how does it go away later?

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Why does staring at something bright leave a black spot on your vision even when you close your eyes, and how does it go away later?

In: Biology

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When the light is too bright, those photoreceptors get over stimulated and remain active for a while even when there is no light source. However doing this for a wile can damage the photoreceptors an cause a condition called Solar Retinopathy.