What do you see when you look at a page of text. Some people, usually children, see more than letters or words. They see things that are not really there: illusions such as movement of the words, movement of the letters, blurring, colours or shapes. Children describe the distortions in a variety of ways: They may say the letters " fiz ", "wobble", " shimmer ", "fly of the page", "drop off the end of the line", "the page comes up and hits my eyes the white paper may glare and cause eye strain or headaches.
The result in perceptual distortion and visual discomfort may interfere with reading. The distortion is common in children who have binocular vision problems (for which conventional treatment with exercises may be appropriate). It can also occur quite independently of any ocular problem in people whose eye sight is otherwise perfect. Frustration and low self-esteem can occur in children who are under-achieving due to visual stress.
