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2. Belay glasses - Wikipedia

   en.wikipedia.org/wiki/Belay_glasses

   The prismatic lenses of the belay glasses are arranged so as to bend light from above through total internal reflection into the observer's eye, allowing the belayer to observe the climber while maintaining a comfortable head/neck position. The design based on the eyeglasses frame provides for a split field of vision: the peripheral field ...

3. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

4. Ophthalmic trial frame - Wikipedia

   en.wikipedia.org/wiki/Ophthalmic_trial_frame

   ophthalmic trial frame is used to hold lenses and other accessories during correction of refractive errors. Test of. Visual acuity. A trial frame is a tool used by ophthalmic professionals like ophthalmologists and optometrists. It is basically an adjustable spectacle frame with multiple cells, used to hold corrective lenses, and other ...

5. Glasses - Wikipedia

   en.wikipedia.org/wiki/Glasses

   Mixed double-frame (Flip glasses) Double-frame eyewear with one set of lenses on the moving frame and another pair of lenses on a fixed frame (optional). The double frame uplifting glasses have one moving frame with one pair of lenses and the basic fixed frame with another pair of lenses (optional), that are connected by four-bar linkage.

6. I tried those Pair Eyewear glasses with the magnetic frames ...

   www.aol.com/lifestyle/tried-those-pair-eyewear...

   You should also measure your current frames to make sure the new ones are a similar size. Pair offers only about 10 frame styles each for men and women, with five available for kids. But you can ...

7. Britney Spears products - Wikipedia

   en.wikipedia.org/wiki/Britney_Spears_products

   Spears was also featured on the commercial of "Twister Rave" and the game included a Twister remix of "Circus". In March 2018, it was revealed that Spears would be the face of Kenzo, a contemporary French luxury clothing house. Spears's range of commercial deals and products also includes beauty care products and perfumes.