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

   www.aol.com/best-doctor-approved-reading-glasses...

   Although Dr. Raviv says basically any shape will work, half-size lenses are best for people without other vision problems, while larger lenses allow room for bifocal prescriptions, the AAO notes ...

3. 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.

4. List of optometric abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_optometric...

   Description ( notes ) AC. Anterior chamber. fluid-filled space between the iris and the endothelium. AC 4/4. Grade 4 anterior chamber angle. open angle between cornea and iris. AC 3/4. Grade 3 anterior chamber angle.

5. 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 ...

6. Phacolytic glaucoma - Wikipedia

   en.wikipedia.org/wiki/Phacolytic_glaucoma

   By performing astigmatism in order to correct the removal of cataract the requirement of prescription glasses and reading glasses post cataract extraction is avoided and ensures better vision for patients. Astigmatism rates increase dramatically from 14.3% in the under 15-year-old age group to 67.2% in the age group of over 65-years old.

7. Autorefractor - Wikipedia

   en.wikipedia.org/wiki/Autorefractor

   The majority of autorefractors calculate the vision correction a patient needs (refraction) by using sensors that detect the reflections from a cone of infrared light. These reflections are used to determine the size and shape of a ring in the retina which is located in the posterior part of the eye.