spectacles

📅 Updated:2020-05-06

🕒 Created:2020-05-06

🆔 ID:30360

Description

A fancy term for glasses that feature corrective lenses. Spectacles help those who have trouble seeing objects close up or at a distance. Bifocals and trifocals are types of spectacles containing lenses designed with multiple focus zones. Bifocals have two focal ranges. Trifocals have three. Multi-focused eyewear may feature a single lens with sections cut for certain focal ranges, or more mechanical varieties feature multiple lenses that can pivot into position to provide multiple levels of focus.