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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.
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 ...
The term "Email Security" refers to the protection of email from viruses and malware, while "AntiSpam" refers to the protection from spam, scam and phishing attacks. The term "Web protection" usually includes protection from: infected and malicious URLs, phishing websites, online identity (privacy) protection and online banking protection.
Out-of-pocket maximum. Another major difference when comparing Original Medicare to Medicare Advantage is out-of-pocket costs. Unlike traditional Medicare, Medicare Advantage plans do have an out ...
McAfee Internet Security Suite – Special Edition from AOL is our most comprehensive security suite, including firewall protection and our maximum defense against viruses, spyware and other security threats. This service normally costs $80 annually, but you get it at no additional charge as part of your membership when you are on an eligible plan.
Intraocular lens. An Intraocular lens ( IOL) is a lens implanted in the eye usually as part of a treatment for cataracts or for correcting other vision problems such as short sightedness and long sightedness; a form of refractive surgery. If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic lens (or ...
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]
Norton AntiVirus is an anti-virus or anti- malware software product founded by Peter Norton, developed and distributed by Symantec (now Gen Digital) since 1990 [ 1] as part of its Norton family of computer security products. It uses signatures and heuristics to identify viruses. Other features included in it are e-mail spam filtering and ...
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