Archive for the ‘Eyeglass Lenses’ Category
Sunday, November 16th, 2008
Do you know what prescription eyeglasses are manufactured of?
The most basic is the glass lens. The glass lens is by far the best in absorbing ultraviolet light. It comes in several different colors and is, of course, scratch resistant. It is also one of the least expensive. The downfall to ...
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Tuesday, September 16th, 2008
How Do Eyeglasses Work?
Article Source: http://EzineArticles.com
Corrective lenses are nothing more than pieces of glass which are cut to a specific curve (your prescription) so that as light enters these glasses, it focuses the image you see on your retina in just the right place. The retina reacts to this light ...
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Thursday, September 11th, 2008
article source: ezinearticles.com
Prescription eyeglasses and prescription sunglasses are manufactured in a variety of materials. The most basic is the glass lens. The glass lens is by far the best in absorbing ultraviolet light. It comes in several different colors and is, of course, scratch resistant. It is also one of ...
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Sunday, July 27th, 2008
From Wikipedia.com
In some cases, mild farsightedness (hyperopia) can be treated with simple magnifying lenses or commodity reading glasses that can be purchased without a prescription. The magnifiers make the image of the object being viewed bigger so that it can be seen better.Over the counter readers are spherical corrective lenses ...
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Sunday, July 27th, 2008
From Wikipedia.com
Single vision lenses correct for only distance or near vision. Patients with presbyopia or other disorders of accommodation often benefit prescriptions from corrections for both distance and near (see Lens Types below). Infrequently, prism and base curve values may also be specified to correct for binocular vision disorders. ...
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Sunday, July 27th, 2008
From Wikipedia.com
Corrective lenses are typically prescribed by an optometrist. The prescription consists of all the specifications necessary to make the lens. Prescriptions typically include the power specifications of each lens (for each eye). Strengths are generally prescribed in quarter-diopter steps (0.25 D) because most people cannot generally distinguish between smaller*Sphere ...
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Sunday, July 27th, 2008
From Wikipedia.com
A corrective lens is a lens worn in front of the eye, mainly used to treat myopia, hyperopia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye. Intraocular ...
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Monday, June 2nd, 2008
Lens strength
The values indicated in the "sphere" and "cylinder" columns of an eyeglass prescription specify the optical power of the lenses in diopters, abbreviated D. The higher the number of diopters, the more the lens refracts or bends light. A diopter is the reciprocal of the focal length in meters. ...
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