I understand why i can get green dots for some time after looking into the sun etc. but why are lasers or welding able to ruin my sight forever?
In: Biology
Light heats things. You know how you can burn things with a magnifying glass and sunlight by focusing the light to a point?
Well, your eyes are designed so that whatever you’re looking at is focused to a point on your retinas, and those cells are fairly sensitive, so when they get blasted with all that heat it’s pretty much game over.
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