OPTICAL

adjective Date: 1570 of or relating to the science of optics, 2. of or relating to vision ; visual , visible 1 , of, relating to, or being objects that emit light in the visible range of frequencies , using the properties of light to aid vision , 3. of, relating to, or utilizing light especially instead of other forms of energy , involving the use of light-sensitive devices to acquire information for a computer , of or relating to ~ art, ~ly adverb