A set-top TV box that can help people with colour blindness better differentiate shades has been developed by a Cambridge firm.
Eyeteq, from University of East Anglia-based company Spectral Edge, alters colours frame-by-frame - without spoiling them for the non-colour-blind.
The technology could also be used on video games, the company said.
A colour-blindness awareness group has called for Eyeteq to be part of all televisions as standard.
The condition affects one in 12 men, and one in 200 women, with red-green colour blindness the most common.
According to Spectral Edge's website: "Eyeteq gently modifies colours in images in such a way that colour-blind observers enjoy both improved visibility as well as the overall appearance."
"With careful design using mathematical perception models," it adds, "we are able to remap colours to maximise discrimination for colour-blind people, at the same as minimising the strength of the effect for non-colour-blind people."
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The company says those who are not colour blind do not mind the colour change as it is slight. It also said there is no noticeable lag as pictures are remapped in real-time, a process that takes milliseconds.
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The technology had now reached proof-of-concept stage, Spectral Edge's managing director Christopher Cytera told the BBC.
"The next step is to refine and upgrade that proof of concept," he said.
"At the moment it's working at 720p resolution, we want to get it to 1080p."
Spectral Edge then plans to license the technology to manufacturers to include in new televisions.
