17 upvotes, 3 direct replies (showing 3)
I mean, everyone has a blind spot in each eye, where the nerve goes through the retina. It's pretty easy to find it, if a person closes one eye, stares fixedly forward with the other one, and moves something small like the mouse cursor around until they can't see it moving.
Comment by coladoir at 04/02/2025 at 23:47 UTC
29 upvotes, 1 direct replies
Wikipedia has a self-test[1] that works on literally everyone because every human has the same exact blindspot in nearly exactly the same position. Of course, nobody is ever consciously aware of this blindspot unless it's pointed out–and even then, your brain never stops filling in the spot.
1: https://en.wikipedia.org/wiki/Blind_spot_(vision)#Blind_spot_test
All mammals have the same blindspot, even, though due to anatomical differences the location is unique to genus, but they're all in the same-ish area due to the overall anatomical similarities. Octopi and other cephalopods do not have such a blind spot as their anatomy is structured essentially in the opposite way as ours and as a result of that structural difference does not have the blind spot.
Comment by Hazel_nut1992 at 05/02/2025 at 00:37 UTC
1 upvotes, 1 direct replies
Mine is cause by nerve damage
Comment by OuterWildsVentures at 05/02/2025 at 13:45 UTC
1 upvotes, 0 direct replies
I just did that and the only spots I couldn't see it were where features of my face blocked sight lol