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    Understanding Vision Problems

    Normal

    Cross section of eye showing light focusing on retina.
    Normal

    Your eyes see an object as light coming from the object. Your cornea focuses light rays onto a layer that lines the inside of the back of your eye (the retina). If your eyes are normal, this creates a focused image on your retina. This makes objects look clear.

    Nearsighted (Myopia)

    Cross section of eye showing light focusing in front of retina.
    Nearsighted

    Your cornea and your retina are too far apart if you’re nearsighted. In other words, your eyeball is longer than average. Sometimes your cornea or your lens has an abnormal shape. This makes light rays from distant objects focus in front of your retina. These objects then look blurry.

    Farsighted (Hyperopia)

    Cross section of eye showing light focusing behind retina.
    Farsighted

    Your cornea and your retina are too close together if you’re farsighted. In other words, your eyeball is shorter than average. Sometimes your cornea or your lens has an abnormal shape. This makes light rays from close objects focus behind your retina. These objects then look blurry.

    Astigmatism

    Cross section of eye showing light focusing in more than one place.
    Astigmatism

    Sometimes your cornea or the lens inside your eye is curved abnormally. Then light rays can’t focus evenly onto your retina. This is called astigmatism. It makes both close and distant objects look blurry.

    Online Medical Reviewer: Chris Haupert MD
    Online Medical Reviewer: Tara Novick BSN MSN
    Online Medical Reviewer: Whitney Seltman MD
    Date Last Reviewed: 8/1/2022
    © 2000-2024 The StayWell Company, LLC. Todos los derechos reservados. Esta información no pretende sustituir la atención médica profesional. Sólo su médico puede diagnosticar y tratar un problema de salud.
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    Southern New Mexico
    Surgery Center

    2301 Indian Wells Rd. Suite B
    Alamogordo, NM 88310
    www.snmsc.org

    Phone: 575.437.0890
    Fax: 575.437.0905
    Email: info@snmsc.org

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