01The guides
Three numbers on the inside of a temple, a dashboard that goes dark through a polarized lens, a child who sits on her sunglasses, a lens colour for a grey afternoon, and a coating the ophthalmologists say nobody needs.
The inside of almost every temple carries three numbers, and they are enough to know whether a frame you have never held will fit. Here is what each one measures, where to find it on your own pair, and how far off is too far.
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A polarizing film turns a white lake back into water and makes a car dashboard go dark, and both happen for the same reason. What the ophthalmologists say it is good for, where it gets in the way, and why it is not UV protection.
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Children spend more time in the sun than adults and the harm adds up over a lifetime, which is why the optometrists want them in sunglasses early. What the lens has to do, what the frame can and cannot survive, and how to check a pair that has been sat on.
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Lens colour is the one choice on a sunglass card that the UV rating does not settle for you. What each tint does to a road, a lake and a flat grey afternoon, and why darker is not safer.
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We sell a frame with a blue-light coating and the ophthalmologists say nobody needs one. Both things are true, and this is the page that says how, including what a coating does, what it does not, and what makes your eyes tired at five o'clock.
Read it →One button, the whole BEALER range
Every lens colour, frame size and pack count in the BEALER selection sits behind this button, with the price from our last update beside it. Read the millimetres off a pair you already own, check them against the card, and the order goes through our retail partner.