Testing & Treatment

The cornerstone of the Irlen Method is its precision-tinted coloured overlays and filters. We use advanced colour spectrometer technology to ensure that our overlays and coloured glasses meet strict standards of colour balancing designed to produce the most effective colour-correction tool.

The Irlen Method utilizes the Irlen Reading Perceptual Scale (IRPS) and the Irlen Differential Perceptual Scale (IDPS). Theses tests measure visual perceptual strength and weeknesses. Visual perception is the ability to interpret or give meaning to what is seen. These scales are designed to measure various aspects of visual perceptual skills. Difficulties with visual processing affect how visual information is interpreted or processed by the brain.

The Irlen Method is a two-step process: problem identification and colour identification and requires two testing sessions. Family members participate with their children in the evaluation process. The colour (which is unique for each person) is the key to the success of the program and can only be determined after a diagnostic assessment performed by a certified educational professional trained in the Irlen Method.

The first testing session: Usine the Irlen Reading Perceptual Scale (IRPS) we determines whether you have Irlen Syndrome and can be helped by the Irlen Method’s colour technology. In this session, we determine how severe your problem is and whether colour can help eliminate your difficulties. Your correct coloured overlay combination is determined at this time. Both certified Irlen Screeners and Diagnosticians can test for Irlen Coloured Overlays.

The second testing session is only for individuals who show moderate to significant improvement with coloured overlays. In this session, we utilze the Irlen Differential Perceptual Scale (IDPS) to target the precise wave lengths of light causing your problems by using a limitless number of colour filter combinations. Your precision colour is worn as glasses or contact lenses. The colour worn as glasses will not be the same as your plastic overlay colour. If your problems are related to math computation, copying, depth perception, light sensitivity, and headaches, coloured glasses are your best treatment option because they correct problems with the printed page and also the environment.

Importantly, wearing the wrong colour can actually cause or worsen your problems. The testing to identify your correct Irlen Spectral Filters to be worn as glasses or contact lenses can only be conducted by Certified Irlen Diagnosticians/Clinics.

Irlen Coloured Overlays

Irlen Overlays are the original coloured overlay technology. They are used by hundreds of thousands of students and over one-million people worldwide. Irlen Overlays are the only coloured overlays available backed by more than a decade of scientific research and used by more than 4,000 school districts worldwide.

Coloured overlays are most effective for individuals whose difficulties are isolated to reading. If you experience challenges with writing, math, depth perception, night driving, or the environment, coloured filters (worn as glasses) will be your best treatment option. However, coloured overlays are an important first step in determining whether the Irlen Method can work for you and provide your first experience with relief.

Coloured Overlays can help:

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Irlen Spectral Filters

For individuals wanting or needing more comprehensive light filtering to alleviate problems associated with both the printed page and in the environment, Irlen Coloured Filters are the answer. Irlen Coloured Filters are precision-tinted for each individual, filtering out the exact wave lengths of light creating perceptual difficulties.

Irlen Coloured Filters can improve problems with:

Only a certified Irlen diagnostician can identify the optimal colour-correction hue and saturation.

Coloured lenses provided by optometrists and vision specialists to treat reading problems are NOT the same as the Irlen Method. These professionals do not have the right colours, or diagnostic process for colour selection. Inaccurate colour selection can result in headaches, eye strain, and fragmented brain processing resulting in more distortions and reading problems.

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Copyright © 1998 - 2016 by Perceptual Development Corporation / Helen Irlen. Translated from www.irlen.com by Damon Steadman. All rights reseverd.