Everyone always says pick up the ball early or see the spin of the ball but very, if any players understands what that means.
The distance of a pitch is generally described in 3 segments of 15 feet. Each segment has different disciplines needed to read the pitch and it is usually determined by the development of your eyes (far sited, near sided, back eye dominate, etc.) and preference of the player. Over the years I have labeled them based on who was best at it.
Segment 1: Hank Aaron (Far sited players)
Players use the silhouette of the pitchers hand to read what pitch is coming. Fat wrist fastball, Skinny wrist curveball, ball pop up at release curveball, etc.
Segment 2: Chipper Jones (20/20 or equal sited players)
Picking up the spin of the ball. The direction of the laces is the direction the ball is traveling.
Segment 3: Pete Rose (near sited back eye dominate players)
See it and hit it. This is normally a reactive hitter with a very short compact swing. Lots of base hits very few home runs.
I highly recommend everyone go see the eye doctor see get a full workup and understand where or what they are capable of.
Know the Why