[Jebusfathead]

Did you know, the red eye in some photos is due to the flash being quickly turned on in a low light environment, so the pupil cannot constrict quick enough to block most of the light, so the light his the back of the eyes and appears red from the blood in your eyes.

No I didn't.

Did you know 20/20 vision is not the best vision, it is the standard vision and quite average, the best vision for humans is around 20/8

I thought 20/10 is the best.

It's calculated like this (Distance from text)/(You see at the same distance as this) so like 20/20 is something 20m away you see as if it was 20m away, 20/10 would be something 20m away you can see as clearly as if it was 10m away, so the best would be like 20/8 since that's sort of the limit, although it could be less idk I'm not an eye doctor guy