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  1. AIR - AAR Corp.

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  3. List of soft contact lens materials - Wikipedia

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

    Types. The FDA classifies soft contact lenses into four groups for the US market. They are also subcategorized into 1st generation, 2nd generation, and 3rd generation lens materials. [6] These 'water-loving' soft contact lens materials are categorized as "Conventional Hydrophilic Material Groups ("-filcon"): Group. Water Content.

  4. Telescopic sight - Wikipedia

    en.wikipedia.org/wiki/Telescopic_sight

    A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. [1] It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim.

  5. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    A pair of contact lenses, positioned with the concave side facing upward. Putting contacts in and taking them out. One-day disposable contact lenses with blue handling tint in blister-pack packaging. Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used ...

  6. Alcon - Wikipedia

    en.wikipedia.org/wiki/Alcon

    Alcon Inc. ( German: Alcon AG) is a Swiss-American pharmaceutical and medical device company specializing in eye care products. It has a paper headquarters in Geneva, Switzerland but its operational headquarters are in Fort Worth, Texas, United States, where it employs about 4,500 people. [2]

  7. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    Presbyopia is a typical part of the aging process. [4] It occurs due to age related changes in the lens (decreased elasticity and increased hardness) and ciliary muscle (decreased strength and ability to move the lens), causing the eye to focus right behind rather than on the retina when looking at close objects. [4]

  8. Vortex Optics - Wikipedia

    en.wikipedia.org/wiki/Vortex_Optics

    Vortex Optics is an American manufacturer of special optical equipments for hunting, wildlife watching, outdoor recreation, shooting sports and law enforcement and military. [1] Vortex products include binoculars, spotting scopes, riflescopes, reflex sights, holographic sights and other accessories. It once had a sister company known as Eagle ...

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