Color blindness is a difficulty in distinguishing colors, especially any colors containing red or green, such as purple, pink, orange and others.
In the retina, there are three types of color cones, whose function is to interpret and differentiate the three basic colors: the red, the green and the blue.
It may be that the color cone receiver is missing or that it is not sensitive enough. The result is that the color blind person cannot easily distinguish certain colors and hues.
This alteration is much more common in men. 8% of men and 0.41% of women have difficulties with green and red colors and see a limited range of hues.
To compensate for this problem, the special EnChroma optical filters separate each color so that the color blind person can differentiate each color and perceive colors mor vibrantly, clearly and distinctly, typically within 15 minutes.
The glasses work for about 80% of color blind cases. The lenses can be graduated in both distant and progressive vision. There are special lenses for interiors and for outdoors. EnChroma glasses are based on science and years of research and development