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Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
Chromatic aberration. Focal length of lens varies with the color of light. In optics, chromatic aberration ( CA ), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. [ 1][ 2] It is caused by dispersion: the refractive index of the lens elements ...
Specialty drugs or specialty pharmaceuticals are a recent designation of pharmaceuticals [ 1][ 2] classified as high-cost, [ 3][ 4][ 5] high complexity and/or high touch. [ 4] Specialty drugs are often biologics [ 3][ 6] —"drugs derived from living cells" [ 7] that are injectable or infused (although some are oral medications). [ 4]
American Hospital Association v. Becerra, No. 20-1114, 596 U.S. ___ (2022) The Medicare Prescription Drug, Improvement, and Modernization Act, [ 1] also called the Medicare Modernization Act or MMA, is a federal law of the United States, enacted in 2003. [ 2] It produced the largest overhaul of Medicare in the public health program's 38-year ...
Private insurance companies administer Medicare Advantage plans. These plans cover all medically necessary services covered by Original Medicare, with additional benefits like vision, hearing, and ...
To access these savings, there’s an annual membership fee of $20 for individuals and $35 for families. Kroger: The Kroger Rx Savings Club offers select medications for $6 or less for a 1-month ...
An optical instrument is said to be diffraction-limited if it has reached this limit of resolution performance. Other factors may affect an optical system's performance, such as lens imperfections or aberrations, but these are caused by errors in the manufacture or calculation of a lens, whereas the diffraction limit is the maximum resolution ...
VSP Vision Care (VSP) is a vision care health insurance company operating in Australia, Canada, Ireland, the United States, and the United Kingdom.It is a doctor-governed company divided into five businesses: “eye care insurance, high-quality eyewear, lens and lens enhancements, ophthalmic technology, and connected experiences to strengthen the relationship between patients and their eye ...
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