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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 ...
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
Formulary (pharmacy) A formulary is a list of pharmaceutical drugs, often decided upon by a group of people, for various reasons such as insurance coverage or use at a medical facility. [ 1] Traditionally, a formulary contained a collection of formulas for the compounding and testing of medication (a resource closer to what would be referred to ...
If you worked for at least 10 years and paid Medicare taxes, you won't pay a Part A premium, but it does have an annual deductible—$1,556 for 2022—plus coinsurance charges for inpatient ...
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 ...
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 ...
Some plans offer additional benefits, including prescription drug coverage, vision, and limited dental. In order to enroll in an MA plan, you must first enroll in Medicare Parts A and Part B.
The Centers for Medicare & Medicaid Services ( CMS) is a federal agency within the United States Department of Health and Human Services (HHS) that administers the Medicare program and works in partnership with state governments to administer Medicaid, the Children's Health Insurance Program (CHIP), and health insurance portability standards.