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  2. American Optical Company - Wikipedia

    en.wikipedia.org/wiki/American_Optical_Company

    Despite being designed for utility, these glasses had advanced properties: teardrop-shaped convex lenses, plastic nose pads, a prominent brow bar and flexible cable temples. The nickel plated frame was made of a copper-based alloy to prevent interference with compasses.

  3. List of United States post office murals - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States_post...

    This is a list of United States post office murals, produced in the United States from 1934 to 1943 through commissions from the Procurement Division of the United States Department of the Treasury. The principal objective of the United States post office murals was to secure artwork that met high artistic standards [ 1 ] for public buildings ...

  4. Silhouette (eyewear) - Wikipedia

    en.wikipedia.org/wiki/Silhouette_(eyewear)

    Silhouette International Schmied AG is an eyewear company headquartered in Linz, Austria. Since 2017, the company is a full-service provider for both frames and lenses. Since 2008, the company has been a state-awarded training company. [1]

  5. Rodenstock GmbH - Wikipedia

    en.wikipedia.org/wiki/Rodenstock_GmbH

    Rodenstock GmbH (German pronunciation: [ˈʁoːdn̩ʃtɔk]) is a German manufacturer of ophthalmic lenses and frames for eyeglasses. The company, which was founded by Thuringian Josef Rodenstock in 1877, is headquartered in Munich.

  6. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    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.

  7. Signed, Sealed and Delivered: 17 Historic and Unique Post ...

    www.aol.com/17-historic-unusual-post-offices...

    Christmas Post Office Christmas, Florida People have been known to drive miles, Christmas cards and packages in hand, to secure the postmark of this site established in 1892. Seasonal postmarks ...

  8. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet.

  9. Essilor - Wikipedia

    en.wikipedia.org/wiki/Essilor

    Essilor has gradually withdrawn its frames business to focus on corrective lenses. It has launched a coating, Crizal, that provides lenses with resistance to scratches, reflections and stains. Essilor partnered with PPG of the United States to develop Transitions, a technology that allows lenses to become darker or lighter depending on the intensity of ambient light. With the acquisition of ...

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