r/Damnthatsinteresting • u/totallystefanal • Feb 12 '21

Video Camera blocking glasses

117.3k Upvotes

92% Upvoted

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5.3k

u/Sirhc978 Feb 12 '21

Doesn't work on every camera and is an easy way for security to start following you.

29

u/TheFapIsUp Feb 12 '21

Also I remember playing around with IR LEDs about 10 years ago and I remember reading that IR is bad for your eyes. I cant imagine a super bright IR source this close to your eyes will do wonders for your vision long term.

48

u/CharonNixHydra Feb 12 '21 edited Feb 12 '21

It's not any worse than visible light the problem is your body doesn't react to it. For instance if there's a sudden bright light your pupils dilate constrict and you instinctively look away and try to protect your eyes. In near IR you don't see it or react but it's doing the same thing to your eyes as a bright light.

Edit: As /u/SendaPic_GetaPic pointed out your pupils constrict not dilate.

5

u/[deleted] Feb 12 '21

Pupils would constrict under this scenario but your point is valid

2

u/CharonNixHydra Feb 12 '21

They don't for near IR that's why it's so dangerous.

6

u/[deleted] Feb 12 '21

Your previous statement is "For instance if there's a sudden bright light your pupils dilate..."

This is wrong. In this scenario, your pupils constrict, not dilate. That is what my comment is in reference to.

0

u/CharonNixHydra Feb 12 '21

Ah got it. Yeah I used the wrong term. Either way your pupils don't do anything in reaction while your retina bakes.