optical
//ˈɒptɪkəl//
Adjective
1
relating to sight or vision, especially the sense of seeing
The optical nerve carries signals from the eye to the brain.
2
relating to light or the properties of light
The optical properties of the glass make it ideal for lenses.
3
relating to devices or instruments that use lenses, mirrors, or other components to aid vision or manipulate light
The microscope uses optical components to magnify tiny objects.