system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: 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?
gpt
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.