enow.com Web Search

  1. Ads

    related to: contact lenses online cheap air optix multifocal contact lenses

Search results

  1. Results from the WOW.Com Content Network
  2. List of soft contact lens materials - Wikipedia

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

    Lenses made of PMMA are called hard lenses. [5] Soft contact lenses were first produced in 1961 by Czech chemical engineer Otto Wichterle using polyhydroxyethylmethacrylate (pHEMA), a material that achieved long-term commercial application. Lenses made of polyacrylamide were introduced in 1971. [5]

  3. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Multifocal contact lenses (e.g. bifocals or progressives) are comparable to spectacles with bifocals or progressive lenses because they have multiple focal points. Multifocal contact lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the ...

  4. Multifocal diffractive lens - Wikipedia

    en.wikipedia.org/wiki/Multifocal_diffractive_lens

    Multifocal diffractive lens. A multifocal diffractive lens is a diffractive optical element (DOE) that allows a single incident beam to be focused simultaneously at several positions along the propagation axis. [1] Example of multifocal peak intensity distribution along optical axis. (Courtesy of Holo/Or)

  5. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    Presbyopia can be corrected using glasses, contact lenses, multifocal intraocular lenses, or LASIK (PresbyLASIK) surgery. The most common treatment is glass correction using appropriate convex lens. Glasses used to correct presbyopia may be simple reading glasses, bifocals, trifocals, or progressive lens.

  6. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    A pair of contact lenses, positioned with the concave side facing upward. 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.

  7. Category:Contact lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Contact_lenses

    Pages in category "Contact lenses" The following 27 pages are in this category, out of 27 total. This list may not reflect recent changes. ...

  1. Ads

    related to: contact lenses online cheap air optix multifocal contact lenses