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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. 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. Lenticular lens - Wikipedia

   en.wikipedia.org/wiki/Lenticular_lens

   A lenticular lens is an array of lenses, designed so that when viewed from slightly different angles, different parts of the image underneath are shown. [ 1][ 2][failed verification – see discussion] The most common example is the lenses used in lenticular printing, where the technology is used to give an illusion of depth, or to make images ...

6. 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 ...

7. List of lens designs - Wikipedia

   en.wikipedia.org/wiki/List_of_lens_designs

   This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...