of, pertaining to, or applying optics
or the principles of optics
constructed to assist sight or to correct defects in vision
of or pertaining to sight or vision; visual.
of or pertaining to the eye.
of or pertaining to an optician or opticians or to their products, especially eyeglasses: an optical service.
dealing with or skilled in optics
is always a great word to know.
So is quincunx. Does it mean: