First let me tell you the context: There was this recently discovered tiny sealstone depicting warriors in battle measuring only 1.4 inches across. This piece contains incredible detail that modern human eye cannot discern without a mechanical aid. Read more at: https://phys.org/news/2017-11-team-rare-minoan-sealstone-treasure-laden.html#jCp The fact that artists 3500 years ago could carve into the stone such details that modern human naked eye cannot resolve suggested to me that 3500 years ago human eye could see more details. I would like to ask you what part of the eye need to change to increase or decrease the resolution of the eye? Is the change need to happen in the lens? I'm not really asking if such a change in human vision is possible or not in terms of evolution in this timeframe. I would like to know the physiological change that would make the human eye see more details than it can see now. Thanks.