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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. Autorefractor - Wikipedia

   en.wikipedia.org/wiki/Autorefractor

   These reflections are used to determine the size and shape of a ring in the retina which is located in the posterior part of the eye. By measuring this zone, the autorefractor can determine when a patient's eye properly focuses an image. The instrument changes its magnification until the image comes into focus.

4. 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 ...

5. 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.

6. Optics and vision - Wikipedia

   en.wikipedia.org/wiki/Optics_and_vision

   Optics and vision. Vision of humans and other organisms depends on several organs such as the lens of the eye, and any vision correcting devices, which use optics to focus the image. The eyes of many animals contains a lens that focuses the light of its surroundings onto the retina of the eye. This lens is essential to producing clear images ...

7. 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 ...