optical

optical
adjective Date: 1570 1. of or relating to the science of optics 2. a. of or relating to vision ; visual b. visible 1 <
optical wavelength
>
c. of, relating to, or being objects that emit light in the visible range of frequencies <
an optical galaxy
>
d. using the properties of light to aid vision <
an optical instrument
>
3. a. of, relating to, or utilizing light especially instead of other forms of energy <
optical microscopy
>
b. involving the use of light-sensitive devices to acquire information for a computer <
optical character recognition
>
4. of or relating to optical art • optically adverb

New Collegiate Dictionary. 2001.

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