Also known as chassis or the base, a frame front is the largest part of an eyewear.
It is made with different materials and combinations like Acetate, TR 90, Titanium,
Wood, Nylon etc.

Lenses are usually made with glass, plastic, or polycarbonate and are fitted
into the frame. These may come with coatings like the anti-reflective coating
to reduce eye strain or prevent Sun-glare.

Temples are the long arms attached to the frame with hinges/screws, usually
with a little bent at the tips to fit well behind the ears. The frame size is
commonly mentioned on the temple insides.