Irlen Syndrome is a hereditary, visual-perceptualReVisionSupplement Reviewproblem that prevents an estimated 14-18% of the population from being able to read efficiently. Irlen Syndrome is not a vision problem of the eye. Irlen Syndrome is the visual-perceptual reception site of the brain perceiving the timing of light waves ineffectively. The disorder remains undetected by standard educational, visual, and medical tests. It is a learning disability.
Individuals with Irlen Syndrome perceive the printed page and sometimes their environment differently. Unlike those without the disorder, reading becomes more difficult over time and physically exhausting. It can also affect attention span, listening, energy level, motivation, and work production. Such individuals are quite light sensitive. They are very familiar with the admonition “Turn on the lights. You'll ruin your eyes.” In fact, many times it is the bright light that is the culprit causing headaches and reading distortions.
In an individual without Irlen Syndrome visual stimuli is processed by the brain usually between 100-150 milliseconds. Once the brain has processed the information, it returns to a readiness state by approximately 200 milliseconds and awaits the next stimulus.
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