Special filters in glasses can help the color blind see colors better, study finds

A new study found that special patented glasses engineered with technically advanced spectral notch filters enhance color vision for those with the most common types of red-green color vision deficiency ('anomalous trichromacy'). Notably, the ability to identify and experience expanded color was also demonstrated when color blind test subjects were not wearing the glasses.

from Health & Medicine News -- ScienceDaily https://www.sciencedaily.com/releases/2020/07/200713165608.htm