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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.
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 most common application for this is the treatment of strabismus.
The parameters specified on spectacle prescriptions vary, but typically include the patient's name, power of the lenses, any prism to be included, the pupillary distance, expiration date, and the prescriber's signature.
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You can keep buying incandescent or halogen bulbs if you'd like, but you're wasting time and money. A $1 incandescent bulb lasts 1,200 hours, requires 21 changes in 23 years, uses $180 worth of ...
With prices starting at $60 per frame, prescription lenses included, Pair is already pretty affordable.
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