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2. These Stylish, Doctor-Approved Reading Glasses Can Help ... - AOL

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   Reading Glasses (5 Pairs) Reading glasses don’t need to cost an arm and a leg, Dr. Raviv says. For just over $15, you can get five pairs of these beloved readers—which means they clock in at ...

3. These 15 Prime Day deals are cheaper than they were on ... - AOL

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   Amazon's annual Prime Day event is well underway — with day 2 deals ending later today, July 17th, in fact — but if you're skeptical about whether or not the deals are actually worth your time ...

4. 50+ of the very best Amazon Prime Day deals under $100 - AOL

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   Magna-Tiles Classic 100-Piece Magnetic Set. $84 $120 Save $36. Another great one for kiddos, these original Magna-Tiles are a fan-favorite in my house and with plenty of knock-off brands that get ...

5. 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]

6. Visual impairment - Wikipedia

   en.wikipedia.org/wiki/Visual_impairment

   Visual or vision impairment ( VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [ 6]

7. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.