When you really analyze it much of the shave routine is done by feel and if you had to most could shave without even looking. We have had a member here who is either legally or totally blind and shaves with a straight.
Just watch out when you get to about shave #10. That's when people become overconfident and shave beyond their abilities and the razor gets them.
+1 . I've found that honing and stropping are also done by "feel" , more than sight .