Scroll to Text Glyndwr University Homepage Contact Us Help and Accessibility Information Site Map Search the Site

What is Irlen Syndrome?

People with Irlen Syndrome (Scotopic Sensitivity) have problems with visual perception. It is the brain that interprets the visual information which is then seen by the individual.
Research indicates that 12-15% of the population suffers from Irlen Syndrome. Many people will only experience slight problems, others may find it hard to learn and study.

Reading may be a problem due to the print on the page being distorted the longer they read. They experience tiredness and/or eye strain these may become itchy or watery; these problems may generate headaches or in severe cases nausea. Also, computers and bright lighting conditions such as fluorescent lighting may be uncomfortable for them to work or study under.

Irlen Syndrome can be associated with other learning problems such as dyslexia or ADD/HD, many people who have dyslexia may also be suffering from Irlen Syndrome.

What are the symptoms?

Light sensitivity

Problems with glare, fluorescent lights, sunlight, and/or night driving. Difficulty in concentrating or working under bright lighting conditions.

Problems with contrast

Difficulty reading from white paper. The page may be too bright or uncomfortable to look at.

Problems with print

Some people experience print distortions such as blurring moving or shaking when reading from a white background for a period of time.

Restricted Reading Span

Inability to read several words at one time. Difficulties with reading ahead and tracking along a line of print making it impossible to skim ahead or speed read.

Lack of Attention

Difficulties concentrating when reading or doing course work. Taking frequent breaks and looking away from the page are necessary to aid concentration levels. May become tired and fidgety.

Poor Depth Perception

Inability to judge distances or spatial relationships between objects. May have problems with walking up or down stairs or bump into table edges or door jams.

Irlen Self Test

Access our online self-test form to see if you have problems associated with Irlen® Syndrome:

Self Test Form

Our student support