Jeff Sullivan from Lookout Landing did an admittedly unscientific but still somewhat interesting study on Lasik eye surgery on ballplayers and how it affected their hitting.
His post has some significant stats. Again, not scientific but his results??
Based on our very limited sample, it seems that LASIK eye surgery can indeed help hitters perform at a higher level. Which we’d expect, given that a good hitter has to be able to, you know, see.
Hmm… very eye opening.