Knowing your frame specifications is very important. Any eyeglass frame consists of 3 major parts in its construction namely frame front, temples and lenses. Some other components of an eyeglass are rim, nose-bridge, nose pads, hinges and temple tips.
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.