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  2. 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.

  3. Canon L lens - Wikipedia

    en.wikipedia.org/wiki/Canon_L_lens

    The 70-200 mm f/2.8L lens. Canon's series of L lenses (Luxury lenses) are a professional line of photography lenses made by Canon.Canon has sold zoom and prime L-series lenses for the discontinued FD lens mount, for the current EF lens mount used on all Canon EOS SLR cameras and for the RF mount used on mirrorless interchangeable-lens cameras.

  4. 4.5-inch Mark 8 naval gun - Wikipedia

    en.wikipedia.org/wiki/4.5-inch_Mark_8_naval_gun

    Fixed QF 46 pounds (21 kg) HE. Calibre. 4.45-inch (113 mm) [1] Rate of fire. 25 rounds per minute automatic. Maximum firing range. 27.5 kilometres (17.1 mi) [2] The 4.5 inch Mark 8 is a British naval gun system which currently equips the Royal Navy's destroyers and frigates, and some British destroyers and frigates sold to other countries.

  5. Mutiny on the Bounty - Wikipedia

    en.wikipedia.org/wiki/Mutiny_on_the_Bounty

    Among the abducted group were six elderly women, for whom Christian had no use; he put them ashore on the nearby island of Mo'orea. Bounty ' s complement now comprised nine mutineers—Christian, Young, Quintal, Brown, Martin, John Williams, John Mills, William McCoy and John Adams (known by the crew as "Alexander Smith") [147] —and twenty ...

  6. CR-39 - Wikipedia

    en.wikipedia.org/wiki/CR-39

    A piece of CR-39 manufactured for radiation detection. Poly (allyl diglycol carbonate) (PADC) is a plastic commonly used in the manufacture of eyeglass lenses alongside the material PMMA ( polymethyl methacrylate ). The monomer is allyl diglycol carbonate (ADC). The term CR-39 technically refers to the ADC monomer, but is more commonly used to ...

  7. Technological and industrial history of 21st-century Canada

    en.wikipedia.org/wiki/Technological_and...

    Users must wear special glasses with a different coloured lens over each eye in order to experience the 3D effect. In 2008, the large Canadian banks, including the Bank of Nova Scotia, the Royal Bank of Canada, the Toronto-Dominion Bank and the Canadian Imperial Bank of Commerce, began issuing Visa credit cards with an embedded microchip for ...

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