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Correcting colour blindness with metasurface contact lenses

Interesting article in E&T today.

I'm sure we've all seen those viral videos of colour blind individuals being given and putting on glasses meant to help them to see the 'real' colours of the world. Now researchers have developed contact lenses designed for those with deuteranomaly, the form of colour blindness that makes it difficult to differentiate between red and green.

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0 davidwalker2 over 4 years ago

Dennis – thank you for that interesting summary of the pitfalls of the common colour blindness tests and for the interesting colour shift examples of the Ishihara diagram, I have not seen this before and it illustrates exactly how it is constructed and the principles behind it. Also the association with and complication of dyslexia.
With the introduction of colour television, in the BBC in the late 1960’s and 70’s we needed to test a lot of staff for colour vision. For the majority, the Ishihara Charts were perfectly adequate, but for critical colour balance the Farnsworth-Munsell 100 was used. That is a much trickier test the colour shift between chips is quite subtle and I confess that I get a few chips wrong.

The link to use of colour for Dyslexics is also interesting. I understand that different dyslexics respond to different colours and although the pale yellow background may help many, some dyslexics respond better to other combinations. My grandson suffers from dyslexia and the specialist tried a number of different colours of filter and ended with a pale purple/ blue specs. They certainly help in some circumstances, but not all.

As for filters used to “correct” colour vision, I am sceptical although I would accept they might help in some circumstances. Dennis illustrates the problem very well with his colour shift experiments; the contrast is increased but the colours seen are wrong. You might argue that the colour deficient see the wrong colours anyway, but my view is that it might produce more problems than it solves.

David
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0 davidwalker2 over 4 years ago

Dennis – thank you for that interesting summary of the pitfalls of the common colour blindness tests and for the interesting colour shift examples of the Ishihara diagram, I have not seen this before and it illustrates exactly how it is constructed and the principles behind it. Also the association with and complication of dyslexia.
With the introduction of colour television, in the BBC in the late 1960’s and 70’s we needed to test a lot of staff for colour vision. For the majority, the Ishihara Charts were perfectly adequate, but for critical colour balance the Farnsworth-Munsell 100 was used. That is a much trickier test the colour shift between chips is quite subtle and I confess that I get a few chips wrong.

The link to use of colour for Dyslexics is also interesting. I understand that different dyslexics respond to different colours and although the pale yellow background may help many, some dyslexics respond better to other combinations. My grandson suffers from dyslexia and the specialist tried a number of different colours of filter and ended with a pale purple/ blue specs. They certainly help in some circumstances, but not all.

As for filters used to “correct” colour vision, I am sceptical although I would accept they might help in some circumstances. Dennis illustrates the problem very well with his colour shift experiments; the contrast is increased but the colours seen are wrong. You might argue that the colour deficient see the wrong colours anyway, but my view is that it might produce more problems than it solves.

David
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Correcting colour blindness with metasurface contact lenses

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