What is it?

Irlen Syndrome, is a perceptual disorder characterized by difficulties with visual processing. It is believed to be caused by a sensitivity to certain wavelengths of light, particularly in the blue and green spectrums.

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Additional names

This group contains additional names:
- Meares-Irlen Syndrome

Signs & symptoms

Individuals with Irlen Syndrome may experience a range of symptoms, including visual distortions, light sensitivity, headaches, fatigue, difficulty reading, and poor depth perception. These symptoms can be particularly pronounced when looking at printed text on a white background, such as in books or on computer screens.


The diagnosis of Irlen Syndrome typically involves a comprehensive evaluation by a qualified professional, such as an optometrist or ophthalmologist, who has received specialized training in the disorder.
The evaluation process may involve several tests, including:
* Symptom Survey: The individual may be asked to complete a survey or questionnaire about their symptoms, such as headaches, eye strain, and reading difficulties.
* Screening Tests: Screening tests, such as the Irlen Diagnostic Screener or the Visual Stress Screening Test, may be administered to assess the individual's sensitivity to light and their ability to perceive certain patterns and shapes.
* Color Overlays: The individual may be asked to look at text through a series of colored overlays to determine whether this improves their ability to read and reduces symptoms.
* Precision Tinted Lenses: If a positive response is observed to the use of color overlays, precision tinted lenses may be prescribed to provide more permanent relief.

It is important to note that a diagnosis of Irlen Syndrome should only be made by a qualified professional, and that the use of colored lenses or overlays should be carefully evaluated and monitored by an eye care specialist.


The treatment for Irlen Syndrome typically involves the use of colored filters or lenses to reduce visual stress and improve reading ability. This treatment is known as "color therapy" or "precision tinting."
During the color therapy process, the individual is provided with a range of colored overlays or lenses that are designed to filter out specific wavelengths of light that may be causing visual stress. The optimal color is determined through a series of tests that evaluate the individual's perception of contrast, clarity, and comfort.
Once the optimal color has been identified, the individual may be provided with precision-tinted lenses or glasses that are designed to filter out the problematic wavelengths of light. These lenses may be worn for reading, computer use, or other activities that may cause visual stress.
In addition to color therapy, other strategies may be recommended to manage symptoms of Irlen Syndrome, such as reducing glare and using good lighting, taking regular breaks during reading or computer use, and using large print or high contrast text. It's important to note that treatment for Irlen Syndrome should be tailored to the individual and monitored by a qualified eye care professional.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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