"Do EnChroma glasses improve color vision for colorblind subjects?". ^ a b Gómez-Robledo, L Valero, EM Huertas, R Martínez-Domingo, MA Hernández-Andrés, J (29 October 2018).The study also found that the color enhancing effect persisted even after taking off the glasses. In 2020, a UC Davis Health Eye Center study, conducted in collaboration with France’s INSERM Stem Cell and Brain Research Institute, found that EnChroma lenses enhanced color vision for those with the most common types of red-green color vision deficiency. The research showed that EnChroma glasses did not reveal any improvement in the Ishihara test and Farnsworth–Munsell 100 hue test. The researchers found the effect of using EnChroma glasses is similar to glasses where the use of color filters changes the user's perception and increases the contrast among the colors, such as those used for shooting or hunting. In 2018, a study of EnChroma lenses showed that they help color blind people to see the same colors in a different way since the colored filter altered the way colors appeared in their eyes. In a subsequent study involving ten individuals with hereditary deficiencies (nine males and one female from age 19 to 52), the EnChroma Cx-14 filters did not significantly influence the vision of color blind subjects and "improved the error score in only two subjects". This induced participants with normal color vision to experience tritan defect when wearing the lens. Scientific analysis Ī study in 2017 involving 23 males aged from 20 to 25 years with normal trichromatic color vision showed that Enchroma Cx-14 lens notches the blue and violet region of the visible spectrum. A number of patents have been awarded based on the technology. The separation of signals allows most people with color blindness to distinguish colors, but the glasses will have little to no effect on the 20% of color blind people who have severe color impairment. The glasses block specific wavelengths to create a clearer separation of different color signals so that they can be better calculated by the brain. To eliminate the overlapping of the wavelengths of light, there is an optical material called a notch filter, which is capable of removing the exact wavelengths of light in the location where it overlaps, getting a simplified differentiation of colors. The lenses focus on the most common color vision deficiency which is caused by the red and green retinal cone cells that, when responding to light, coincide. The upper picture shows an ordinary scene taken through an ordinary lens, while the lower shows the same scene taken through an EnChroma lens
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