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  2. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    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. Vertex distance - Wikipedia

    en.wikipedia.org/wiki/Vertex_distance

    Since most refractions (the measurement that determines the power of a corrective lens) are performed at a vertex distance of 12–14 mm, the power of the correction may need to be modified from the initial prescription so that light reaches the patient's eye with the same effective power that it did through the phoropter or trial frame. [1]

  4. 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 ]

  5. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    A person's visual acuity is registered documenting the following: whether the test was for distant or near vision, the eye(s) evaluated and whether corrective lenses (i.e. glasses or contact lenses) were used: Distance from the chart D (distant) for the evaluation done at 20 feet (6 m). N (near) for the evaluation done at 15.7 inches (400 mm).

  6. Sales taxes in the United States - Wikipedia

    en.wikipedia.org/wiki/Sales_taxes_in_the_United...

    New Jersey does not charge sales tax on goods purchased for resale or on capital improvements but does charge sales tax on certain services. [159] New Jersey does not charge sales tax on gas, however, that is subject to a $0.375/gallon excise tax. Cigarettes are subject to a $2.70/pack excise tax, in addition to sales tax.

  7. Opium - Wikipedia

    en.wikipedia.org/wiki/Opium

    Opium (or poppy tears, scientific name: Lachryma papaveris) is dried latex obtained from the seed capsules of the opium poppy Papaver somniferum. [4] Approximately 12 percent of opium is made up of the analgesic alkaloid morphine, which is processed chemically to produce heroin and other synthetic opioids for medicinal use and for the illegal drug trade.

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