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  2. List of soft contact lens materials - Wikipedia

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

    Focus Dailies, Focus Dailies Toric/Progressive, Dailies AquaComfort Plus, FreshLook One-Day, Synergy, Triton Hilafilcon A: 70: 35: Hilafilcon B: 59: 22: SofLens 59, SofLens Daily Disposable, SofLens Daily Disposables for Astigmatism Acofilcon A: 58: 25.5: Flexlens Tricurve Keratoconus Nesofilcon A: 78: 42: Biotrue ONEday

  3. Phoropter - Wikipedia

    en.wikipedia.org/wiki/Phoropter

    The presence of cylindrical power indicates the presence of astigmatism, which has an axis measured from 0 to 180 degrees away from being aligned horizontally. Phoropters are made with either plus or minus cylinders. Traditionally, ophthalmologists and orthoptists use plus cylinder phoropters and optometrists use minus cylinder phoropters. One ...

  4. Astigmatism (optical systems) - Wikipedia

    en.wikipedia.org/wiki/Astigmatism_(optical_systems)

    Astigmatism can be often corrected by glasses with a lens that has different radii of curvature in different planes (a cylindrical lens), contact lenses, or refractive surgery. [5] Astigmatism is quite common. Studies have shown that about one in three people suffers from it. [6] [7] [8] The prevalence of astigmatism increases with age. [9]

  5. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    The abbreviation PH is followed by the visual acuity as measured with a pinhole occluder, which temporarily corrects for refractive errors such as myopia or astigmatism. PHNI means no improvement of visual acuity using a pinhole occluder. So, distant visual acuity of 6/10 and 6/8 with pinhole in the right eye will be: DscOD 6/10 PH 6/8.

  6. How to Soothe a Teething Puppy's Sore Gums - AOL

    www.aol.com/soothe-teething-puppys-sore-gums...

    Even a dog food sold to promote dental health by reducing plaque has as its main ingredient the cheap carbohydrate filler brewers' rice, plus corn and powdered cellulose (wood pulp) (3).

  7. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    Against-the-rule astigmatism – the horizontal meridian is steepest (a rugby ball or American football standing on its end). [17] Oblique astigmatism – the steepest curve lies in between 120 and 150 degrees and 30 and 60 degrees. [17] Irregular astigmatism – principal meridians are not perpendicular.

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