optical
adjective
uk/ˈɒptɪkəl/ usrelating to light and the ability to see:
optical equipment/goods/devices
They manufacture a variety of lenses, mirrors, prisms, and other optical components.
IT
relating to the ability of a piece of electronic equipment to recognize printed or written letters or numbers:
an optical scanner/reader
optically
adverb
The machine optically scans the passport to verify the person's identity.