For perspective: Arguing "I know I guy who needs to squint to see things that are far away but he's an amazing pianist" doesn't add to a discussion about early detection of vision impairment and vision loss.
For perspective: Arguing "I know I guy who needs to squint to see things that are far away but he's an amazing pianist" doesn't add to a discussion about early detection of vision impairment and vision loss.
I cannot agree with your perspective comparison. Vision many help someone learn piano more quickly at first, but is immaterial to their maximum ability as a pianist. A better comparison is early detection of the development of additional fingers or exceptionally large hands (example: Rachmaninoff), both of which directly and permanently affect a person's ability to play difficult piano pieces. This too would be a concerning eugenics issue.
They typically can’t deliberately choose the subject of the focus, but it’s usually the case that any bit of deep knowledge is useful for something.