A team of scientists in the UK has developed a pair of contacts that could help people suffering from red-green colour vision deficiency (CVD).
Study authors believe these new colour blindness-correcting lenses will be a convenient way for CVD sufferers to see the world in full colour.
To create these new soft contacts, researchers at the University of Birmingham used a
safe rhodamine derivative dye to draw distinctions between red and green wavelengths.
Keeping these two wavelengths separate helps people with red-green CVD differentiate
between the two colours.
After they created these lenses, researchers gathered a group of red-green CVD patients
and asked them to look at coloured numbers through a slide with the dyed lens. Study
authors noted that patients were better able to perceive the colours on the numbers when
looking through the dyed lens.
While many companies have already developed glasses for colour blindness, this is the
first time a group of scientists has created a successful pair of contact lenses. Study
authors believe these dyed lenses will be a more affordable and convenient option for
CVD patients that are easily compatible with prescription lenses.
There’s no word when these dyed lenses will be available to the public. Scientists at the
University of Birmingham say they are now organizing more patient trials to perfect this
new lens design.
Current estimates suggest about 2.7 million people in the UK have some degree of CVD.
Colour blindness affects men far more than women with about 1 in 12 males inheriting
the disease compared with 1 in 200 females.
Dr. Haider Butt, who teaches microengineering and nanotechnology at the University of
Birmingham, was the lead author on this study. A few other key researchers involved in
this project include Abdel-Rahman Badawy, Muhammad Umair Hassan, and Mohamed
Anyone interested in reading more about this research should pick up the latest copy of
Advanced Healthcare Materials. This article was published under the name, “Contact
Lenses for Colour Blindness.”