The frame is nothing more than a thin metal wire that doesn't even go around the lens, or it can be a large plastic shell covering most of the face. Most frames are mostly flat, so they can be folded into a bag. However, some people prefer a wrap-around style that fits snugly around the head and closes the eyes completely in the shade. You can have a look at ladies designer sunglasses at various online stores. Find something you think is well done, healthy, and ready.
Lenses are available in nearly every colour on the spectrum, including more than one. Glass lenses are still used, but plastics dominate a large part of the market. Polycarbonate lenses are the choice when you are working in hazardous environments because they are nearly indestructible.
Bridge: The part of the sunglasses that extends through the nose.
Cat's Eye: Most common in sunglasses for women; This lens is wider in the centre than on either side. with a bigger curve on the bottom than above.
Clip-on: Sunglasses that attach to corrective glasses by mechanical or magnetic clips.
Impact-resistant (also "safety glasses" or "goggles"): lenses, usually polycarbonate, for shock absorption. Remember that they are resistant to destruction, they are not resistant to destruction. If you need them, just choose sunglasses that are FDA or ANSI compliant.
Polarized sunglasses: With a filter between the front and back of the lens, horizontal light reflection is significantly reduced. Very useful around water, snow, ice, glass, etc.
Temple: The hand of the glasses goes from the ear to the lens frame.
Packaging: The lens and temples are wrapped around the head or temples at the level of the lenses. They eliminate peripheral vision but add extra sun protection.