optical
Pronunciation:
/ˈɒptɪkəl//ˈɑptɪkəl/adjective
Definitions
Of, or relating to sight; visual.
Example: Strabismus is an optical defect.
Designed to assist or enhance sight
Example: A microscope is an optical instrument.
Of, or relating to optics.
Example: Refraction is an optical effect.
Of, or relating to visible light.
Example: Optical telescopes don't work when it is cloudy.