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  2. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    Other symptoms can include eyestrain, headaches, and trouble driving at night. [1] Astigmatism often occurs at birth and can change or develop later in life. [5] If it occurs in early life and is left untreated, it may result in amblyopia. [2] The cause of astigmatism is unclear, although it is believed to be partly related to genetic factors.

  3. 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]

  4. Stigmator - Wikipedia

    en.wikipedia.org/wiki/Stigmator

    The magnetic stigmator is a weak cylindrical lens that can correct the cylindrical component of the beam. It can consist of metal rods which induce a magnetic field, which are inserted with their long axis towards the beam center. By retracting or extending the rods, the astigmatism can be compensated. [12]

  5. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    When refractive errors in children are not treated, the child may be at risk of developing ambylopia, where vision may remain permanently blurry. [33] Because young children typically do not complain of blurry vision, the American Academy of Pediatrics recommends that children have yearly vision screening starting at three years old so that unknown refractive errors or other ophthalmic ...

  6. Limbal relaxing incisions - Wikipedia

    en.wikipedia.org/wiki/Limbal_relaxing_incisions

    Limbal relaxing incisions (LRI) are a refractive surgical procedure to correct minor astigmatism in the eye. Incisions part way through the cornea are made at one side or at opposite edges of the cornea, following the curve of the iris, causing a slight flattening of the cornea in that area. [1]

  7. Alpins method - Wikipedia

    en.wikipedia.org/wiki/Alpins_method

    The intended putt (the path from the ball to the hole) corresponds to Alpins' target-induced astigmatism vector (TIA), which is the astigmatic change (by magnitude and axis) the surgeon intends to induce to correct the patient's pre-existing astigmatism to the derived or calculated target.

  8. All You Need Is Kill - Wikipedia

    en.wikipedia.org/wiki/All_You_Need_Is_Kill

    All You Need Is Kill [a] is a Japanese science fiction light novel by Hiroshi Sakurazaka with illustrations by Yoshitoshi Abe.The book was published in Japanese by Shueisha under their Super Dash Bunko imprint in December 2004, and was later released in English by Viz Media under their Haikasoru imprint.

  9. Cells at Work! Code Black - Wikipedia

    en.wikipedia.org/wiki/Cells_at_Work!_Code_Black

    While the Neutrophils hold them off, AA2153 returns to the kidneys and urges them to evacuate, but Gran refuses to allow them. The Glomeruli start complaining. Gran sacrifices herself to shield one of them from a bacterium before U-1196 is able to kill it. Before she dies, Gran apologizes for pushing them so hard, but their work is vital to the ...

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