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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.
Vertex distance. Vertex distance is the distance between the back surface of a corrective lens, i.e. glasses (spectacles) or contact lenses, and the front of the cornea. ...
Prism lenses (here unusually thick) are used for pre-operative prism adaptation. 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.
Boyd adds: “Glasses naturally draw attention to your eyebrows. So keeping them neat allows for a neater look to the eye area overall.” Tip #3: Curl Your Lashes (and Use a Good Mascara)
Protect your sleep and reduce eye strain with blue light blocking glasses! These stylish glasses filter out the harmful blue light emitted from screens, preventing it from disrupting your sleep ...
Don't invest in a stronger pair of reading glasses; just adjust your font size instead. AOL Mail lets you enlarge your text size by opening to your Settings and choosing 'Enable large text size.'
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The eye relief given in product specifications does not always give a realistic view of what a user can expect. Although eye-cups can usually be folded down to allow the spectacle wearer to get closer to binocular eyepieces, there are sometimes lens mountings that do not allow the theoretical eye relief to be obtained.
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