Quote:
Originally Posted by DNSB
About some things? Yes. Staring at the sun without protection is one of them.
I seem to remember from safety training a few decades back that permanent damage to the retina can occur in 100 seconds or less which is considerably less than the 5 minutes or 300 seconds you were suggesting.
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And a mirror is pretty much the same as direct.
Much less than 100s can leave you with permanent damage, even during an eclipse. Symptoms may take half a day to develop. There is no treatment. You might eventually recover or not notice the damage eventually if it's slight.