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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.
Typical pair of single vision glasses Single vision lenses correct for only one distance. If they correct for far distance, the person must accommodate to see up close. If the person cannot accommodate, they may need a separate correction for near distances, or else use a multifocal lens (see below).
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.
Myopia, also known as near-sightedness and short-sightedness, [ 5 ] is an eye disease [ 6 ][ 7 ][ 8 ] where light from distant objects focuses in front of, instead of on, the retina. [ 1 ][ 2 ][ 7 ] As a result, distant objects appear blurry while close objects appear normal. [ 1 ] Other symptoms may include headaches and eye strain. [ 1 ][ 9 ] Severe myopia is associated with an increased ...
Save 15% with promo code YAHOO15 If you've never ordered glasses online before, you'll want to be sure to have an updated prescription close at hand, complete with pupillary distance (PD ...
Watch the video to see Pita’s priceless reaction when she received her first pair of glasses! To celebrate solving Pita's vision problems, Dana took her on an adventure to the zoo.