Wes Jenkins offers a lengthy article on why the slider devastates hitters. In the article, he drops this gem:
While soft focus to hard focus simplifies how players can keep their eye on the ball, most of the work of hitting actually has to do with genetics. According to Dr. Daniel Laby, an optometrist specializing in sports vision who has worked with eight major league teams, major league players have 20/12 eyesight on average, meaning they can see two lines further on an eye chart than your standard 20/20 vision human.
If a player comes in with 20/20 eyesight thinking he has perfect vision, Laby will give him corrective lenses because the standard human vision just won’t cut it.
The scourge of PELs (Performance Enhancing Lenses) is upon us!
from baseballmusings.com https://ift.tt/2RdpOrT
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