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Colorimetry & Visual Stress

Discover how colour can alleviate visual discomfort and help with dyslexia.

Visual stress is a term used to describe visual discomfort and perceptual distortions in the printed text, suffered by many people who struggle to read. The condition is estimated to be present in about 40 % of poor readers and in 20 % of the general population in varying degrees.


Coloured overlays can improve reading speed and accuracy. They can enable longer periods of reading free of discomfort. When they do, it is an indication that the individual may benefit from Precision Tinted Lenses. The lenses are prescribed using specialist equipment called a Colorimeter.

"I read an article in 2018 about coloured lenses helping with migraines. As someone who has struggled with hemiplegic migraines for over 20 years and whose migraines are debilitating not least because they cause paralysis anything that may help was worth a try. With the support of the staff I tried the colorimetry test normally used for dyslexic clients. As I showed definite reactions to the test, I tried some glasses with the coloured coating applied. I can say that there has been an 80% improvement regarding fully blown migraines. I do still get some symptoms, but the difference is huge and has enabled me to pursue study and a new career path. Thank you all so much for your help and support. "

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