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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Vision and the role of 11-cis-retinal in the process. The retina comprises cones and rods, which mediate color and low light vision, respectively. The vitamin A derivative 11-cis-retinal is found in the rods, forming rhodopsin.