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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. 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 ...

  4. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres. At this distance, the symbols on the line representing "normal" acuity subtend an angle of five minutes of arc, and the thickness of the lines and of the spaces between the lines subtends one minute of arc. This line, designated 6/6 (or 20/20), is the ...

  5. List of abbreviations used in medical prescriptions - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_used...

    This is a list of abbreviations used in medical prescriptions, including hospital orders (the patient-directed part of which is referred to as sig codes). This list does not include abbreviations for pharmaceuticals or drug name suffixes such as CD, CR, ER, XT (See Time release technology ยง List of abbreviations for those).

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

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

    CVS says it will start offering CostVantage in the first half of 2024 to patients using some third-party cash discount cards, such as GoodRX, which help with out-of-pocket costs. CVS drugstores ...

  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. Autorefractor - Wikipedia

    en.wikipedia.org/wiki/Autorefractor

    Here, lenses are switched in and out of a phoropter and the patient is asked "which looks better" while looking at a chart. This feedback refines the prescription to one which provides the patient with the best vision.

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

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

    CVS Health is introducing changes to how its prescription drug pricing model works, and that could lead to some savings for customers starting next year. The health care giant said Tuesday that it ...

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