What Does Optical Mean For Glasses?

Need for Optical Frames The lenses in optical frames change the direction of light rays entering into the eyes so that they focus them properly on the retina in the eye.
op·​ti·​cal | \ ˈäp-ti-kəl \
1 : of or relating to the science of optics
2a : of or relating to vision : visual

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

3a : 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