According to Matt Walker (the sleep expert), if you hold your thumb out at arm’s length then your thumb nail is roughly the size of what your eyes actually see and your peripheral vision is just your mind filling in what it believes to be there. Also you look at an average of 4 different spots per second even if you don’t feel your eyes moving.
thatbitchulove2hate t1_j9dqcic wrote
Reply to comment by SomethingIrreverent in I want to see the Andromeda Galaxy with my naked eye. I can't, I have a method of finding it using Cassiopeia and a field to walk out on to get away from the lights. by vnevner
According to Matt Walker (the sleep expert), if you hold your thumb out at arm’s length then your thumb nail is roughly the size of what your eyes actually see and your peripheral vision is just your mind filling in what it believes to be there. Also you look at an average of 4 different spots per second even if you don’t feel your eyes moving.