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2. Glasses are 50% off at GlassesUSA during Black Friday ... - AOL

   www.aol.com/lifestyle/glasses-usa-black-friday...

   Get a new pair of glasses as low as $26 at GlassesUSA during Black Friday week. Shop high-end brands like Ray-Ban or more affordable brands—they're all on sale.

3. Coupon Cabin - Wikipedia

   en.wikipedia.org/wiki/Coupon_Cabin

   CouponCabin is a free service for users and does not require registration. Codes are redeemable online, which users can search for by store, category, location or type of deal being offered. CouponCabin's coupon database includes exclusive CouponCabin codes, [ 3 ] manufacturer and store coupons, free shipping coupons, and user-submitted codes ...

4. Base curve radius - Wikipedia

   en.wikipedia.org/wiki/Base_curve_radius

   Base curve radius (BCR) or simply base curve (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 (BCOR). Typical values for a contact ...

5. Radius of curvature (optics) - Wikipedia

   en.wikipedia.org/wiki/Radius_of_curvature_(optics)

   Radius of curvature sign convention for optical design. Radius of curvature (ROC) has specific meaning and sign convention in optical design.A spherical lens or mirror surface has a center of curvature located either along or decentered from the system local optical axis.

6. Shop these 10 thoughtful gifts under $50 from Nordstrom that ...

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   For the really late shoppers, you can get your gifts in time if you order by 12 pm EST on December 22 and select two-day shipping at checkout, but don't wait too long; these hot-ticket items won't ...

7. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   The base curve (usually determined from the profile of the front surface of an ophthalmic lens) can be changed to result in the best optic and cosmetic characteristics across the entire surface of the lens. Optometrists may choose to specify a particular base curve when prescribing a corrective lens for either of these reasons. A multitude of ...

8. Baby Has $5 Million Surgery to Remove Left Side of Brain at ...

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   Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer , from celebrity news to compelling human interest stories. The Mesa Family

9. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.