For many, coloured overlays make reading easier. When the correct colour is placed over reading material there is an immediate reduction in the glare of the white page and the contrast of the black text on white paper. In addition, the pattern of the text and the letters is altered so it no longer triggers perceptual distortions. The result is a page that is easier to look at, and thus easier to read.  


Opticalm carries a wide selection of overlay colours from several suppliers to provide a full range of options to meet our client’s needs.  See our "About Overlays" section for more information.

Crossbow full page overlays: Single Colour – Pack of 4

  • Crossbow Education overlays have been formally designed by visual stress specialists and researchers to provide a full range of colours that are evenly spaced around the colour spectrum. These overlays have a moderate saturation. They can be used on their own, doubled for deeper saturation, or paired with neighbouring colours to provide the maximum number of effective combinations.   


    Stringent testing ensures that the overlays are clear and print clarity is retained.


    This set of 4 overlays is great for allowing you to have two overlays for home and two for school or work. Some people may need to double their overlays to increase colour saturation if the glare from the page is still too strong. 


    These overlay sets are available in: magenta, pink, orange, yellow, celery, grass, jade, aqua, sky blue, purple, and grey. 

Opticalm Visual Stress Clinic

160 Terence Matthews Cres., Suite A1, Main Floor

Kanata ON K2M 0B2

Tel: 613-294-6437

Fax: 613-254-9206

By appointment only

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