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  1. SOFT - SofTech, Inc.

    Yahoo Finance

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    at Tue, Apr 30, 2024, 10:22AM EDT - U.S. markets open in 47 minutes

    Delayed Quote

    • Ask Price 0.00
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    • P/E
    • 52 Wk. High 0.00
    • 52 Wk. Low 0.00
    • Mkt. Cap 105,520.00
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  3. 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 ...

  4. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    A Fresnel lens ( / ˈfreɪnɛl, - nəl / FRAY-nel, -⁠nəl; / ˈfrɛnɛl, - əl / FREN-el, -⁠əl; or / freɪˈnɛl / fray-NEL [1]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.

  5. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Contact lenses, other than the cosmetic variety, become almost invisible once inserted in the eye. Most corrective contact lenses come with a light "handling tint" that renders the lens slightly more visible on the eye. Soft contact lenses extend beyond the cornea, their rim sometimes visible against the sclera. Rigid lenses

  6. Aberrations of the eye - Wikipedia

    en.wikipedia.org/wiki/Aberrations_of_the_eye

    Low order aberrations (hyperopia, Myopia and regular astigmatism), are correctable by eyeglasses, soft contact lenses and refractive surgery. Neither spectacles nor soft contact lenses nor routine keratorefractive surgery adequately corrects high order aberrations.

  7. Optical coating - Wikipedia

    en.wikipedia.org/wiki/Optical_coating

    An optical coating is one or more thin layers of material deposited on an optical component such as a lens, prism or mirror, which alters the way in which the optic reflects and transmits light. These coatings have become a key technology in the field of optics.

  8. Oxygen permeability - Wikipedia

    en.wikipedia.org/wiki/Oxygen_permeability

    Oxygen permeability (OP) is a parameter of a contact lens that expresses the ability of the lens to let oxygen reach the eye by diffusion. In soft contact lenses, it is dependent on the thickness of the lens and the material of the lens, especially concerning the water content.

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