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  2. Abbe number - Wikipedia

    en.wikipedia.org/wiki/Abbe_number

    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 ...

  3. Chromatic aberration - Wikipedia

    en.wikipedia.org/wiki/Chromatic_aberration

    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 ...

  4. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    The add segment of the lens for near vision is the D-shaped area. A bifocal is a lens with two sections, separated by a line (see image to the right). Generally, the upper part of the lens is used for distance vision, while the lower segment is used for near vision. The area of the lens that caters to near vision is called the add segment.

  5. Dental, Vision, and Hearing Coverage with Medicare ... - AOL

    www.aol.com/dental-vision-hearing-coverage...

    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 ...

  6. Specialty drugs in the United States - Wikipedia

    en.wikipedia.org/wiki/Specialty_drugs_in_the...

    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]

  7. Drug Coupons and Medicare: What You Need to Know - AOL

    www.aol.com/lifestyle/drug-coupons-medicare-know...

    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 ...

  8. Medicare Prescription Drug, Improvement, and Modernization Act

    en.wikipedia.org/wiki/Medicare_Prescription_Drug...

    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 ...

  9. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    The US Food and Drug Administration (FDA) defines soft contact lenses as: made of soft, flexible plastics that allow oxygen to pass through to the cornea. Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses. Newer soft lens materials include silicone-hydrogels to provide more oxygen to your ...

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