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  2. 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 ...

  3. Polyvinylpyrrolidone - Wikipedia

    en.wikipedia.org/wiki/Polyvinylpyrrolidone

    PVP is used in some contact lenses and their packaging solutions. It reduces friction, thus acting as a lubricant, or wetting agent, built into the lens. Examples of this use include Bausch & Lomb's Ultra contact lenses with MoistureSeal Technology and Air Optix contact lens packaging solution (as an ingredient called "copolymer 845").

  4. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    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 ...

  5. Optics - Wikipedia

    en.wikipedia.org/wiki/Optics

    Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. [1] Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Light is a type of electromagnetic radiation, and other forms of ...

  6. America's Next Top Model season 15 - Wikipedia

    en.wikipedia.org/wiki/America's_Next_Top_Model...

    The fifteenth cycle of America's Next Top Model premiered on September 8, 2010 and was the ninth cycle to be aired on The CW network.. Several changes were made to the show in a bid to place greater emphasis on high fashion, including a lineup of prominent fashion industry guest judges and photographers as well as a change in prizes.

  7. Schlieren photography - Wikipedia

    en.wikipedia.org/wiki/Schlieren_photography

    Schlieren photography is used to visualise the flows of the media, which are themselves transparent (hence, their movement cannot be seen directly), but form refractive index gradients, which become visible in schlieren images either as shades of grey or even in colour. Refractive index gradients can be caused either by changes of temperature ...

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