The Reason Of Irlen Syndrome

As a hereditary visual perceptual problem, Irlen Syndrome affects the reading ability of approximately 14% to 18% of the world population

. Suffering Irlen Syndrome, patients have difficulty in perceiving the printed page and the surrounding environment. This condition can easily lead to reading deficiency and physically exhaustion. In addition, patients with Irlen Syndrome usually have decreased attention span, listening ability, energy level, motivation and work production. The old term Turn on the lights, youll ruin your eyes. can also apply to people with Irlen Syndrome.

Irlen Syndrome is actually a learning disability, rather than a visual problem of the eye. It is a condition that the visual-perceptual reception site of the brain perceives the timing of light waves ineffectively. In a normal individual, the brain can process visual stimuli within 130-150 milliseconds. And another 200 milliseconds are needed for the brain to return to a readiness state and wait for the next stimulus.

However, the ability of the brain perceiving light waves in an Irlen Syndrome patient is unavailable. Irlen Syndrome patients usually have an early hyper reactivity to visual stimuli between 30-60 milliseconds, which is 3-9 standard deviations above normal. In addition, a graph will further cause an extreme spike at the beginning. After that, a latency period would occur. This is normally the right time the brain is processing the information. As a result, the brain has to reprocess the information, delaying complete processing into 400-500 milliseconds. If a second stimulus occurs, the brain is still busy processing the first one. This condition is the exact reason for the distortion happening to Irlen Syndrome.

After such a distortion, the brain often takes several moments to clear it. The problem is that this kind of distortion always occurs every waking moment, so that the brain has no time to recover. Although this disorder of the brain is still undetected by standard education, visual and medical tests, modern technologies such as the DESA (Digital EEG Spectral Analysis) can explicitly explain this phenomenon now.

If you want to know more about vision knowledge, then feel free to visit http://vision.firmoo.com/eye-diseases

by: EdwardTurner

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