optical glass

English

Etymology

From optical +‎ glass from being the type of glass used for optics.

Noun

optical glass (countable and uncountable, plural optical glasses)

1. A class of glass used to create optical lenses, such as that for spectacles or spyglasses

Hyponyms

• crown glass
• flint glass
• natural glass (optometry) ("glass" (not plastic) lens glass for eyeglasses)

See also

• organic glass (plastic lens plastics)