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  2. Defocus aberration - Wikipedia

    en.wikipedia.org/wiki/Defocus_aberration

    The extent of blurry vision can be assessed by measuring visual acuity with an eye chart. Blurry vision is often corrected by focusing light on the retina with corrective lenses. These corrections sometimes have unwanted effects including magnification or reduction, distortion, color fringes, and altered depth perception.

  3. 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 ...

  4. List of satellite map images with missing or unclear data

    en.wikipedia.org/wiki/List_of_satellite_map...

    Images of the prime minister's official residence, The Lodge have not been blurred. However, images of its roof have been and the entrance to The Lodge is blurred in Google Street View. [6] The government of Malaysia has stated that it will not ask Google to censor sensitive areas because that would identify the locations it deemed to be ...

  5. Blurred vision - Wikipedia

    en.wikipedia.org/wiki/Blurred_vision

    Blurred vision is an ocular symptom where vision becomes less precise and there is added difficulty to resolve fine details. Temporary blurred vision may involve dry eyes, eye infections, alcohol poisoning , hypoglycemia , or low blood pressure .

  6. Visual snow syndrome - Wikipedia

    en.wikipedia.org/wiki/Visual_snow_syndrome

    Normal vision vis-à-vis disturbed vision. In addition to visual snow, many of those affected have other types of visual disturbances such as starbursts, increased afterimages, floaters, trails, and many others. [15] Visual snow likely represents a clinical continuum, with different degrees of severity.

  7. Eye strain - Wikipedia

    en.wikipedia.org/wiki/Eye_strain

    A page or photograph which shows the same image twice, but slightly displaced–from a printing mishap, a camera moving during the shot, etc.–can cause eye strain due to the brain misinterpreting the image fault as diplopia and reacting by adjusting the sideways movements of the two eyeballs, in an attempt to fuse the two images into one.

  8. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    Far-sighted vision on left, normal vision on right Human eye cross-section A diagnosis of far-sightedness is made by utilizing either a retinoscope or an automated refractor-objective refraction; or trial lenses in a trial frame or a phoropter to obtain a subjective examination.

  9. Myopia - Wikipedia

    en.wikipedia.org/wiki/Myopia

    Near-sighted vision (left), normal vision (right) A myopic individual can see clearly out to a certain distance (the far point of the eye), but objects placed beyond this distance appear blurred . [ 16 ] [ 25 ] If the extent of the myopia is great enough, even standard reading distances can be affected.