The main visual skills needed for learning are:
Aiming the eyes or shifting rapidly from one object to another (reading from word to word).
Following moving objects smoothly and accurately (keeping your place when on a line; catching a ball).
Seeing with both eyes and combining information received through each eye to make one mental picture. Using one eye and mentally shutting off the other is suppression.
Turning the eyes toward each other to look at near objects (words at reading distance) and maintaining eye alignment comfortably and efficiently over time (attention span).
Determining relative distances between objects by looking at them from two different places (the two eyes) simultaneously.
The area over which vision is possible, including motion, relative position of objects in space, contrast and movement sensitivity in side vision (reading from line to line without getting lost on the page).
Organising and recognising visual sensations as shapes, noticing like and differences (the difference between “was and saw”, “that and what”,” 21 and 12″, “e and o”etc.).