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2. 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]

3. List of age-related terms with negative connotations - Wikipedia

   en.wikipedia.org/wiki/List_of_age-related_terms...

   Old cow: A rude term for an older woman, especially one who is overweight or obese and homely. Old fart: [7] A boring and old-fashioned silly person. Old maid: An older never married lady. ( see "spinster" below) Olderly: Newfoundland slang term for "elderly"; can be offensive or neutral depending on the context.

4. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   Eyeglass prescription. Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.

5. Older women are different than older men. Their health is ...

   www.aol.com/finance/older-women-different-older...

   Older women are also more likely than older men to have multiple medical conditions, disabilities, difficulties with daily activities, autoimmune illness, depression and anxiety, uncontrolled high ...

6. People Who Never Need Glasses Do This One Thing Every Day - AOL

   www.aol.com/people-never-glasses-one-thing...

   Not really. "Some people need glasses when they're young—before 45," explains , of Cleveland Clinic’s Cole Eye Institute. "If you don't need glasses before your 40s, chances are you will need ...

7. Adjustable-focus eyeglasses - Wikipedia

   en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

   Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has to change their eye position ...