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2. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Reading glasses are single vision lenses designed for near work and include over the counter glasses. They come in two main styles: full frames, in which the entire lens is made in the reading prescription, and half-eyes, style glasses that sit lower down on the nose . [ 2 ]

3. 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.

4. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   For example, the Nikon D3 and D700 cameras' nominally full-frame sensors actually measure 36 × 23.9 mm, slightly smaller than a 36 × 24 mm frame of 35 mm film. As another example, the Pentax K200D 's sensor (made by Sony ) measures 23.5 × 15.7 mm, while the contemporaneous K20D 's sensor (made by Samsung ) measures 23.4 × 15.6 mm.

5. AMD - Wikipedia

   en.wikipedia.org/wiki/AMD

   Advanced Micro Devices, Inc. (AMD) is an American multinational corporation and technology company headquartered in Santa Clara, California and maintains significant operations in Austin, Texas.

6. Purple martin - Wikipedia

   en.wikipedia.org/wiki/Purple_martin

   The purple martin (Progne subis) is a passerine bird in the swallow family Hirundinidae. It is the largest swallow in North America. Despite its name, the purple ...

7. List of Empire ships (R) - Wikipedia

   en.wikipedia.org/wiki/List_of_Empire_ships_(R)

   Hundreds of Empire ships were employed by the Government of the United Kingdom. [1] They were acquired from a number of sources: many were built for the government; others obtained from the United States; still others were captured or seized from enemy powers.