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Irlen Syndrome (also labelled- Scotopic Sensitivity,Visual stress, Meares-Irlen) is a perceptual dysfunction, which affects the way in which the brain interprets the visual information being sent from the eyes.

Irlen Syndrome is not a vision problem in the accepted sense and sufferers do not always have difficulty reading. Irlen Syndrome is a complex condition which causes stress to the individual resulting in a variety of problems.

These problems can range from physical symptoms including:
  • chronic migraines
  • eye strain
  • nausea
  • dizziness
  • and abdominal pain
to neurological and psychological symptoms
such as:
  • depression and anxiety
  • sensory overload
  • low confidence
  • and lack of self-esteem
The educational difficulties are more widely known, such as:
  • reading and comprehension problems
  • lack of confidence
  • ADHD
  • behavioural difficulties
  • under achievement in exams for an otherwise bright child

Undiagnosed, the problems continue into adulthood bringing the same difficulties to the work place and home.

It is a complex and variable condition which can often coexist with learning difficulties. Irlen Syndrome can be found in combination with dyslexia, autism, ADHD, dyspraxia, dysphasia, or hyperactivity. This light sensitivity can also lead to overloading the other senses, often triggering distress and migraines.

Irlen Screeners are certified to administer the first testing session and determine whether an individual will benefit from further evaluation for Irlen Spectral Filters. There are thousands of certified Irlen Screeners worldwide. For a screener near to you, contact Irlen East. Irlen Diagnosticians are certified to administer both. During the initial testing session, an individual is screened to determine whether they will benefit from wearing Irlen Spectral Filters, the specific areas of improvement, and the amount of improvement for reading and other academic activities. In addition, during this session 12 other areas will be evaluated and recommendations made.

Only Irlen Diagnosticians are certified to test and determine your customised spectral filters worn as Irlen glasses or contact lenses.

Irlen is EU registered trademark no 5669809IRLEN. The use of trademark Irlen® throughout this site is an authorised and regulated use the trademark.

Copyright © 1998-2006 by Perceptual Development Corp/Helen Irlen. All rights reserved.

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