Eyewear, explained
The Designer Glasses Editorial Team 
A P3 frame is a softly rectangular shape — wider than it is tall, with gently tapered upper corners and a fuller, more rounded lower edge. It sits between a true rectangle and an oval, and it’s one of the most common general-purpose shapes in optical history, worn by everyone from opticians to soldiers to … Read more
A wayfarer is a trapezoid-shaped frame — wider at the top than the bottom, with a flat brow line and angular corners — originally cut from thick acetate rather than wire or metal. What makes it durable is proportion: the shape reads as bold on almost any face, and it has never really gone out … Read more
What is an aviator frame? An aviator frame is a large, teardrop-shaped lens set into a thin metal frame, usually with a double or triple bridge and lenses that narrow toward the bottom rather than sitting evenly balanced like a circle or square. It was designed in the 1930s for military pilots, whose eyes needed … Read more
A browline frame is one where the top rim is thick, usually plastic, and shaped like an eyebrow, while the bottom half of the lens is held by a much thinner rim or bar, often metal. The contrast between heavy top and light bottom is the whole point — it reads as bold from the … Read more
A cat-eye frame is any pair of glasses where the top rim sweeps up and outward at the outer corners, ending in a point or a flick rather than curving back down. That upswept line is the whole definition — everything else, from colour to rim depth, is variation on it. The shape dates to … Read more
A round frame is one where the lens shape is a true or near-true circle, with no flat edges and no dominant horizontal or vertical stretch. It flatters faces with strong angles — square jaws, pronounced cheekbones, a defined brow — by softening them, which is why it tends to sit best on angular rather … Read more
The difference comes down to how much of the lens edge is covered by frame material. A full rim frame encloses the entire lens in plastic or metal. A half rim (or semi-rimless) frame holds the lens along the top only, with the bottom edge exposed or held by a thin wire or nylon cord. … Read more
The numbers stamped inside a temple arm — something like 52□18-140 — describe the frame’s physical dimensions, not the prescription. The first figure is lens width, the second is bridge width, and the last is temple (arm) length, all in millimetres. They tell you how the frame is built, not how well you’ll see through … Read more
About what you read here. Everything on The Designer Glasses is general information and our own editorial opinion. We research carefully and we say when the evidence is unclear, but we can be wrong, things change, and no article can know your particular situation. Please do your own research and make your own judgement rather than treating anything here as the final word. This is not medical advice, not a diagnosis, and not a substitute for speaking to an optometrist, optician or eye doctor about your own eyes, vision and eyewear. We are writers and researchers, not clinicians. We do not recommend prescription treatments or give doses. If something is painful, getting worse, or worrying you, please talk to a professional — going early is not an overreaction.