Irlen Syndrome is defined as a visual processing disorder that can mimic what people consider to be dyslexia and/or ADD/ADHD. Discovered by Helen Irlen some 30+ years ago, Irlen Syndrome can be the leading cause of many learning difficulties.
People with Irlen Syndrome have a light sensitivity in the Visual Cortex - the part of the brain responsible for interpreting the light waves which make up the images we see. For these people, certain parts of the light spectrum cause problems. When those colours are absent, reading and writing can occur easily. When the colours are present, the individual with Irlen experiences discomfort, fatigue, and a general feeling of 'this is all too hard'.
Basically, what happens is the images sent via the eyes to the brain travel through 2 nerves (4 in total - 2 from each eye). Normally, these 2 nerves fire at the same time sending an image which is in sync; crisp and clear for the brain to interpret. In Irlen Syndrome, one of these nerves fires at a slower rate causing the resulting images to be blurry and fuzzy - similar to looking at a 3 D TV screen without the 3 D glasses on.
People with Irlen Syndrome have a light sensitivity in the Visual Cortex - the part of the brain responsible for interpreting the light waves which make up the images we see. For these people, certain parts of the light spectrum cause problems. When those colours are absent, reading and writing can occur easily. When the colours are present, the individual with Irlen experiences discomfort, fatigue, and a general feeling of 'this is all too hard'.
Basically, what happens is the images sent via the eyes to the brain travel through 2 nerves (4 in total - 2 from each eye). Normally, these 2 nerves fire at the same time sending an image which is in sync; crisp and clear for the brain to interpret. In Irlen Syndrome, one of these nerves fires at a slower rate causing the resulting images to be blurry and fuzzy - similar to looking at a 3 D TV screen without the 3 D glasses on.