Researchers have incorporated ultra-thin optical devices known as metasurfaces into off-the-shelf high-tech contact lenses to correct deuteranomaly, a form of red-green color blindness. The new customizable contact lens could offer a convenient and comfortable way to help people who experience various forms of color blindness. This research can also improve the quality of plastic opthalmic lenses.
Problems with distinguishing red from green interrupt simple daily routines such as deciding whether a banana is ripe. The contact lenses use metasurfaces based on nano-metric size gold ellipses to create a customized, compact and durable way to address these deficiencies.
The researchers report that, based on simulations of color vision deficiency, their new metasurface-based high-tech contact lenses can restore lost color contrast and improve color perception up to a factor of 10. The approach used to introduce new and tailor-designed functionalities to contact lenses could be expanded to help other forms of color vision deficiency and even other eye disorders.