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  2. Base curve radius - Wikipedia

    en.wikipedia.org/wiki/Base_curve_radius

    Base curve radius, or simply base curve, abbreviated BCR or BC, is the measure of an important parameter of a lens in optometry. On a spectacle lens, it is the flatter curvature of the front surface. On a contact lens it is the curvature of the back surface and is sometimes referred to as the back central optic radius (abbreviated BCOR ).

  3. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Reading glasses are available without prescription from drugstores, and offer a cheap, practical solution, though these have a pair of simple lenses of equal power, and so will not correct refraction problems like astigmatism or refractive or prismatic variations between the left and right eye. For the total correction of the individual's sight ...

  4. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power, added to the wearer's correction for the other refractive errors. The gradient starts at the wearer's distance prescription at the top of the lens and reaches a ...

  5. CVS prescription pricing change doesn't necessarily mean ...

    www.aol.com/cvs-prescription-pricing-change...

    CVS will soon change the way it prices drugs and it could impact how much your prescriptions cost. The company says it'll launch CVS CostVantage next year, its new drug pricing formula that will ...

  6. Vertex distance - Wikipedia

    en.wikipedia.org/wiki/Vertex_distance

    Vertex distance. 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. Increasing or decreasing the vertex distance changes the optical properties of the system, by moving the focal point forward or backward, effectively changing ...

  7. CVS will change the way it prices prescription drugs - AOL

    www.aol.com/cvs-change-way-prices-prescription...

    CVS Pharmacy is revamping the way it reimburses its pharmacies for prescription medications, which it says will bring more transparency and simplicity to its drug pricing system, the company ...

  8. CVS Health lays out changes to clarify prescription drug ...

    www.aol.com/news/cvs-health-lays-changes-clarify...

    CVS Health runs one of the nation’s largest drugstore chains and a large pharmacy benefit management business that operates prescription drug coverage for big clients like insurers and employers.

  9. List of instruments used in ophthalmology - Wikipedia

    en.wikipedia.org/wiki/List_of_instruments_used...

    Contact lenses. to correct refractive errors of the eye; a little invasive. Phoropter. used in refraction testing. Tonometers. used to determine the intraoccular pressure (IOP) - useful in glaucoma; video link for various types of tonometers. Speculum: to keep the eyes open during any operation. Universal eye speculum.

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