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ADD is an abbreviation for Near Addition. This is the additional refractive power to be combined, or added, to the distance power to achieve the ideal near power. Prism and Base Prism refers to a displacement of the image through the lens, often used to treat strabismus and other binocular vision disorders.
Prism correction. Prism lenses (here unusually thick) are used for pre-operative prism adaptation. Eye care professionals use prism correction as a component of some eyeglass prescriptions. A lens which includes some amount of prism correction will displace the viewed image horizontally, vertically, or a combination of both directions.
The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Cool frames, right? Actually, this is the "confetti top," one of dozens of magnetic clip-ons you can add to any Pair Eyewear glasses. (Photo: Pair)
He noted that the company was unable to support his prescription that required both prism correction and progressive lens so he had to purchase two glasses. After receiving the glasses, Lazarus found that the frames "had looked pretty cool online [but] appeared a bit cheaper in person".
This kit is designed to clean pretty much anything you might put over your eyes — prescription eyewear, blue-light glasses, sunnies, virtual reality gear, even cameras and devices.
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