1. Full-rimmed: The most common type of frame, characterized by its sturdiness, ease of shaping, and ability to conceal some lens thickness.
2. Nylon Wire Frames: These frames use a very thin nylon wire for part of the rim. The lenses are specially ground so that their lower edge is flattened, with a narrow groove in the lower edge where the nylon wire is embedded, creating a rimless look. This results in a very lightweight and elegant appearance, while also being quite sturdy.
3. Rimless Frames: These frames have no rims, only a metal bridge and temples. The lenses are directly screwed to the bridge and temples, usually requiring holes to be drilled in the lenses. Rimless frames are lighter and more stylish than regular frames, but slightly less strong.
4. Combination Frames: These frames have two sets of lenses at the front, one of which can be flipped up. They are typically suitable for both indoor and outdoor use.
5. Folding Frames: These frames can be folded into four or six sections, often used for reading glasses.
6. Semi-rimless frames: Semi-rimless frames use a very thin nylon thread for part of the frame edge. They are lightweight, giving a delicate and stylish feel, and are also relatively sturdy.
7. Eyebrow frames: Eyebrow frames are similar to semi-rimless frames. The upper half of the frame has only a single thread resembling an eyebrow, while the lower half uses a very thin nylon thread for the frame edge. They offer a more fashionable style.
