Irlen Syndrome has a lot to do with the vision system, but not with eyesight. In some people light interferes with the brain's ability to process visual information. This is sometimes referred to as "visual perceptual difficulties" or "visual processing difficulties".
When we see things clearly, it is easy to assume that everyone else does also. This is not always the case. Research tells us that 15% of the general population (and 50% of the reading disabled population) have moderate to severe problems with seeing print, people's faces and the environment in a normal way. (See the distortions page.) This is often accompanied by eyestrain, difficulty focusing, light sensitivity, headaches or migraines, depth perception, inefficient reading, poor spelling, and a reluctance to write.
If you are unsure if the Irlen Method is for you, fill out the Self Test; a considerable number of "yeses" means we can help.