Actually, I don't have sources on hand, but I believe average human sight is better than 20/20. It's just that 20/20 was decided on as a standard for "good enou

Actually, I don't have sources on hand, but I believe average human sight is better than 20/20. It's just that 20/20 was decided on as a standard for "good enough". I believe stemming from a military standard set long ago.