Spelling can be accomplished in several ways. Some people memorize the sequence of letters and use aural reinforcement, ie spelling out loud. Others use visualization, reaching for a pencil to write the word to see if it “looks right.” Visualization is more efficient, particularly for phonetically irregular words. Patients who cannot spell may suffer from deficient visualization abilities or may be dyseidetic. The primary objective of vision therapy is to improve visual memory and visualization. Naturally, improvement in visualization cannot replace the need of exposure to written material because a word cannot be visually recalled if a child has not experienced the word. A major non-visual basis for spelling difficulty is a lack of reading.