Color Blindness Test
There is generally no treatment to cure color deficiencies. Optometrists can supply colored spectacle lenses or a single red-tint contact lens to wear on the non-dominant eye but, although this may improve discrimination of some colors it can make other colors more difficult to distinguish. A 1981 review of various studies to evaluate the effect of the X-chrom contact lens concluded that, while the lens may allow the wearer to achieve a better score on certain color vision tests, it did not correct color vision in the natural environment. The GNOME desktop environment provides colorblind accessibility using the gnome-mag and the libcolorblind software. Using a gnome applet, the user may switch a color filter on and off choosing from a set of possible color transformations that will displace the colors in order to disambiguate them. The software enables, for instance, a color blind person to see the numbers in the Ishihara test.
Color Blindness Test
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