Why we have blind spots, and cool trick to see the blood vessels inside your own eye
 

Turns out the inside of the human eye is essentially backwards which is why we have a blind spot. So much for intelligent design.

How to see the vascalature inside your eye by simply using your hand @6:18


https://www.youtube.com/watch?featur...v=L_W-IXqoxHA#!

I see them now, at first I thought it was the hairs on my middle finger. http://www.discussworldissues.com/fo...ies/smiley.gif

His part 2 on how, and why, we can see white blood cells using blue light is also interesting.



I actually thought I had hundreds of parasites swimming around in my eyes once while using a counterfeit bill testing light (bright blue light).

I've since noticed the same phenomena while suntanning.

Maybe the reason for the reversal of vessel over receptor is in the first cellular fetus stage?

Either that or better to dream with... http://www.discussworldissues.com/fo...ies/smiley.gif

Was just reading it could have to do with UV light protection. A circumstance underwater creatures never really have to deal with.

Perhaps an interesting argument for evolution....the underwater "ideally" designed eye climbs out of the ocean, and has to pull a 180 design wise to avoid getting burnt out by UV light. Only trade off is the blind spot.

Strange, right so the first in/out vertebrates were like a Tool gif all the time. Interesting stuff.

http://images.coolchaser.com/themes/...8-Tool_Eye.gif