Pertaining to sight or light (7)
I believe the answer is:
optical
(Other definitions for optical that I've seen before include "Relating to light/vision" , "Using visible light" , "Capitol (anag.)" , "Visual" , "Concerning sight" .)
I believe the answer is:
optical
(Other definitions for optical that I've seen before include "Relating to light/vision" , "Using visible light" , "Capitol (anag.)" , "Visual" , "Concerning sight" .)