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  2. List of soft contact lens materials - Wikipedia

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

    Proclear 1-Day, Proclear EP, Proclear 1 day Multifocal, Proclear Multifocal Toric, Biomedics XC, Aveo Omafilcon B: 62: 21.3–52.3: Proclear Sphere, Proclear toric, Proclear toric XR, Proclear multifocal, Proclear multifocal XR, Proclear multifocal toric Vasurfilcon A: 74: 39.1: Precision UV Hioxifilcon A: 59: 28

  3. Intraocular lens power calculation - Wikipedia

    en.wikipedia.org/wiki/Intraocular_lens_power...

    Through normal eyes an average velocity of 1555 m/s is accepted for calculation. Modern instruments use separate sound velocities for the different eye components to obtain the total axial length. The measured transit time is converted to a distance using the formula d=t/v Where d is the distance, t is the time and v is the velocity. [1]

  4. Intraocular lens - Wikipedia

    en.wikipedia.org/wiki/Intraocular_lens

    Pre-operative measurements, including corneal curvature, axial length, and white-to-white measurements are used to estimate the required power of the IOL. These methods include several formulae, including Hagis, [32] Hoffer Q, [32] Holladay 1, [32] Holladay 2, [32] and SRK/T. [33] Free online calculators use similar input data. [32]

  5. Multifocal intraocular lens - Wikipedia

    en.wikipedia.org/wiki/Multifocal_intraocular_lens

    People who have a multifocal intraocular lens after their cataract is removed may be less likely to need additional glasses compared with people who have standard monofocal lenses. [2] People receiving multifocal lenses may experience more visual problems, such as glare or haloes (rings around lights), than with monofocal lenses. [2]

  6. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Contact lenses are ocular prosthetic devices used by over 150 million people worldwide, [1] and they can be worn to correct vision or for cosmetic or therapeutic reasons. [2] In 2010, the worldwide market for contact lenses was estimated at $6.1 billion, while the US soft lens market was estimated at $2.1 billion. [3]

  7. 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.

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