Eyewear, explained
The Designer Glasses Editorial Team 
A double bridge is a second bar running across the top of the nose piece, sitting just above the main bridge and usually visible as a thin strip of metal or acetate between the lenses. It began as a structural fix for early metal frames, but on most modern glasses it’s there for proportion and … Read more
A saddle bridge is a wide, curved section of the frame that sits directly across the top of the nose, spreading the frame’s weight over a broader area instead of resting on two small pads. It solves the discomfort and slipping that come from a narrow bridge concentrating weight on two tiny points of skin. … Read more
A keyhole bridge is the double-arched shape cut into the top centre of a frame, where the two lenses meet — named because, seen from the front, the gap looks like an old-fashioned keyhole. Some faces need that extra width and lift at the bridge for a frame to actually sit level; the shape gives … Read more
What are geometric frames, and who suits them? Geometric frames are glasses built from deliberate, often angular shapes — hexagons, octagons, trapezoids, sharp-cornered rectangles — rather than the softened curves most eyewear defaults to. They suit people who want their glasses to read as a design choice first, and who are comfortable with a frame … Read more
An oversized frame doesn’t change your face — it changes how the eye reads the space around it. A frame that’s wider or deeper than your features can make eyes look smaller, cheeks look narrower, and a short face look shorter. Get the scale right and the same size can do the opposite: open the … Read more
A square frame has lenses that are roughly as tall as they are wide, with corners that are sharp or only lightly softened. A rectangular frame is wider than it is tall, with the same straight lines but a longer, shallower shape. The difference is proportion, not style family — both belong to the same … Read more
A panto frame is a lens shape with a rounded top and a slightly flatter, straighter bottom edge — somewhere between a full circle and a soft square. The name comes from “pantoscopic,” an old optical term, but today it simply describes this particular silhouette: gently domed above, tapered below. What does “panto” actually mean? … Read more
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
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.