Tel Aviv University researchers have developed customizable contact lenses that can correct deuteranomaly, a form of red-green colorblindness. Ultra-thin optical devices were incorporated into off-the-shelf contact lenses.
https://www.geek.com/news/these-high-tech-contact-lenses-correct-color-blindness-1819860/
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-6-1379