I'm going through this myself (in a very leisurely manner). If you wish to compose then photoreading music theory books may help some-especially if you fully activate them.
But the real thing with composing I've found, is to play with it. Really, keep trying to find chord and key scales that work for you.
Listen to piano music, really listen. Listen for how combinations of light and heavy notes are used, tempo and mood are expressed. Attempt with simple melodies to alter the "feel" of what you are playing.
If you are after more conventional music reading, then whilst PR'ing music theory and beginner's books will help on one level you are back to "practice, practice, practice". Also you'll still need to practice scales, appegios, on both hands. And chord changes.
Haptic or tactile memory isn't affected that much by photoreading-so teaching your hands, and your hand-eye connection (reading music) is still number one.
One other thing-if you are attempting to learn one particular piece (that's what I do-I find one that's not too hard that I really like), Don't sit there for hours in one sitting. Practice thoroughly for 10-20 mins at a time, then practice something different like a key exercise for a few minutes then break. stretch, walk etc. come back in half an hour or so. If you would do 2 hrs in one day-make it 4 half hour sessions-all through the day. Including one before bed if possible. You'll soon find certain times of day work brilliantly, others not so hot. Fit to your own daily mental cycle.
P.S With the above advice, you ought to know-I can barely read the base clef at all, and I can only slowly read the treble clef :-). I do play with composing and can do simple chords. So in other words, I'm no trained pianist AT ALL 
. So the above is my opinions only and other people here may be real players and have better things to tell you.
