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2. Lens - Wikipedia

   en.wikipedia.org/wiki/Lens

   A burning apparatus consisting of two biconvex lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

3. Refractive error - Wikipedia

   en.wikipedia.org/wiki/Refractive_error

   One style is hard contact lenses, which can distort the shape of the cornea to a desired shape. Another style, soft contact lenses, are made of silicone or hydrogel. Depending on the duration they are designed for, they may be worn daily or may be worn for an extended period of time, such as for weeks. [32] There are a number of complication ...

4. CVS Health - Wikipedia

   en.wikipedia.org/wiki/CVS_Health

   2015: CVS Health acquires Target Corporation's 1,600+ pharmacies and retail medical clinics inside Target stores. CVS has begun operating them through a store-within-a-store format. [25] 2017: CVS announced they would be installing 25 vending machines in high traffic areas like, bus terminals, airports, and college campuses.

5. AOL

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6. Porro prism - Wikipedia

   en.wikipedia.org/wiki/Porro_prism

   An image travelling through a Porro prism is rotated by 180° and exits in the opposite direction offset from its entry point. While a single Porro prism can be constructed to work as well as a roof prism, it is seldom used as such. Therefore, to reduce the cost of production for a Porro prism, the edge of the roof is usually left out.

7. AOL

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   Connectez-vous à AOL pour accéder à vos emails, à l'actualité, au divertissement et à bien plus encore. Créez un compte gratuit et sécurisé avec AOL Mail.