Frames, lenses and how to choose eyewear that suits you
The Designer Glasses Editorial Team 
Hand-polishing removes the last, fine layer of material left by milling and cutting, rounding every edge and corner until the acetate is smooth to the touch and glassy under light. It does not change the colour or structure of the material — it changes how the surface reflects light, how the frame feels against skin, … Read more
A frame is made by cutting a rough shape from flat sheet material or metal stock, machining it down to the finished silhouette, drilling and fitting the hinges and lens openings, then polishing and finishing by hand or machine. What separates a good frame from a poor one is how much of that process is … Read more
A screwless hinge joins the temple to the frame front without a visible screw holding it together. Instead, the two parts are held by a pin, a spring-loaded barrel, or a friction-fit mechanism built into the metal or acetate itself. The name refers to what you can’t see, not to an absence of engineering. It’s … Read more
A rivet hinge is the plainest kind of hinge there is: a metal pin pushed through interlocking barrels on the temple and the front, then flattened or peened at both ends so it can never work loose. There’s no spring, no give, no cushioning. Some makers still use it because that rigidity is exactly the … Read more
What is a spring hinge? A spring hinge is a small coiled spring built into the hinge barrel of a temple, letting the arm flex outward past its normal open position and then pull itself back. Instead of stopping rigidly at 180 degrees, the temple gives a little under pressure, which is meant to ease … Read more
A wooden frame is genuinely lighter and warmer against the skin than most acetate or metal, and no two pairs look quite the same because the grain runs differently through each one. The trade-off is that wood is less forgiving to adjust, more sensitive to moisture and sweat, and needs a specialist rather than a … Read more
Horn and buffalo horn frames are eyewear made from the keratin horn of water buffalo (or occasionally other cattle), cut, heated and pressed into shape rather than moulded from plastic. No two pieces look alike — the mottling, translucency and colour banding come from the animal itself, which is exactly the point for people who … Read more
Stainless steel in glasses is a durable, corrosion-resistant frame metal that sits between everyday alloys like Monel and premium options like titanium — stronger than most budget metals, heavier than titanium, and largely immune to the rust and skin discolouration that cheaper metal frames can develop over time. What exactly is stainless steel in a … Read more
Monel is a nickel-copper alloy, and it turns up in eyewear because it solders easily, holds a spring temper well, and resists corrosion better than plain steel — all at a manufacturing cost far below titanium. That combination is why so many metal frames, from budget to mid-range designer, use it somewhere, usually in the … Read more
Beta-titanium is a titanium alloy engineered to be more elastic than standard titanium, meaning it can flex and spring back rather than bend and stay bent. In eyewear, it turns up mostly in temples, hinges and thin structural parts where a frame needs to give a little under pressure without deforming or snapping. What makes … 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.