What is a bifocal made of?

Bifocal lenses are typically made from materials such as glass or various types of plastic, including polycarbonate and high-index plastic. These materials are chosen for their optical clarity and durability. Bifocals consist of two distinct optical powers, with the upper portion for distance vision and the lower portion for near vision, which can be molded or laminated into a single lens. Additionally, some bifocal lenses may feature anti-reflective coatings or scratch-resistant treatments for enhanced performance.