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astigmatic    
a. 乱视的;散光的

乱视的;散光的

astigmatic
adj 1: of or relating to a defect in the eye or in a lens caused
by a deviation from spherical curvature which prevents
light rays from meeting at a common focus and so results
in distorted images [ant: {anastigmatic}, {stigmatic}]


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  • Astigmatism - Wikipedia
    Astigmatism is a type of refractive error due to rotational asymmetry in the eye's refractive power The lens and cornea of an eye without astigmatism are nearly spherical, with only a single radius of curvature, and any refractive errors present can be corrected with simple glasses
  • Astigmatism - Symptoms causes - Mayo Clinic
    Astigmatism is a type of refractive error caused when either the cornea or the lens has mismatched curves This makes vision blurry because there are two image points Astigmatism may occur in combination with other refractive errors, which include: Nearsightedness (myopia)
  • Astigmatism: Causes, Symptoms, Diagnosis, and Treatment - WebMD
    Astigmatism is a condition in which your eye, especially your cornea or the clear front part of the eyeball, isn’t completely round Almost all of us have some degree of astigmatism
  • Astigmatism - American Academy of Ophthalmology
    Astigmatism is an imperfection in the normal curvature of your eye’s cornea or lens Video: What Is Astigmatism? What Causes Astigmatism? How Does Astigmatism Affect Vision? How Can You Tell if You Have Astigmatism? How Is Astigmatism Diagnosed? How Is Astigmatism Corrected? What Do Astigmatism Measurements Mean on Your Eye Prescription?
  • Astigmatism - National Eye Institute
    Astigmatism is a common eye problem that can make your vision blurry or distorted It happens when your cornea (the clear front layer of your eye) or lens (an inner part of your eye that helps the eye focus) has a different shape than normal The only way to find out if you have astigmatism is to get an eye exam
  • What Is Astigmatism? - Vision Center
    Astigmatism is a common eye problem that makes your vision blurry at near and far distances It occurs when the cornea or lens of the eye is irregularly shaped When the eye's curvature isn't smooth and even, light rays cannot properly focus, causing blurred vision
  • Astigmatism: Eye Changes, Testing, and Correction
    In astigmatism, the cornea (the clear dome that covers your eye) or the lens (which focuses light rays on the light-sensitive retina) is abnormally shaped Wearing contact lenses or glasses that refocus light rays where they should be can enable you to see as clearly as possible
  • Astigmatism: Causes, Types, Symptoms Treatment - Healthline
    Astigmatism is a common vision problem caused by an error in the shape of the cornea Symptoms can differ from person to person but may include blurry vision and difficulty seeing at night With
  • Astigmatism Q A - Symptoms, Causes, Treatment
    Astigmatism is defined by an abnormality in the shape of either the cornea (the outer surface of the eye) or the lens (a structure inside of the eye) In a normal eye, the curve of the cornea and lens are the same shape With astigmatism, there is a mismatch between the two, affecting the eye’s ability to properly focus its image back to top
  • Astigmatism—A closer look at causes, symptoms, treatments
    Don’t let the long, technical name fool you, there's nothing to fear about astigmatism It’s simply a term used to describe an eye that has a more cylindrical shape than a spherical one This difference in shape is what affects eyesight Astigmatism is actually quite common and can be corrected





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