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    • Amblyopia

      • Amblyopia is clinically defined as reduction of visual acuity in one or both eyes, caused by abnormal binocular interaction during the critical period of visual development, that cannot be attributed to any ocular or visual system abnormality or to refractive error. 1 The American Academy of Ophthalmology considers amblyopia an interocular difference of 2 lines or more in a visual acuity table (without specifying any), or visual acuity worse than or equal to 20/30 with the best optical...
      www.aao.org › education › disease-review

      Amblyopia: Types, Diagnosis, Treatment, and New Perspectives

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  3. my.clevelandclinic.org › health › diseases20/20 Vision: What It Means & Corrective Methods

    Apr 25, 2022 · The definition of 20/20 vision is the ability to see an object clearly from 20 feet away. Others with normal vision can also see an object clearly at that distance. 20/20 vision refers to “normal” vision, not “perfect” vision. Visual acuity is a term that means clarity or sharpness of vision and that the objects you see are crisply ...

  4. www.afb.org › blindness-and-low-vision › eyeLow Vision and Legal Blindness Terms and Descriptions

    Those descriptions are no longer in general use, however. Here is one definition of low vision, related to visual acuity: Low vision is a condition caused by eye disease, in which visual acuity is 20/70 or poorer in the better-seeing eye and cannot be corrected or improved with regular eyeglasses.

  5. www.medicalnewstoday.com › articles › what-does-2020/20 vision: Effects, diagnosis, maintenance, and more

    Dec 13, 2022 · According to the American Academy of Ophthalmology (AAO), 20/20 vision means that a person can see an object with clarity or sharpness at 20 feet away. It is also the standard that...

  6. www.verywellhealth.com › what-does-it-mean-to-beLegally Blind: What It Means and What to Do - Verywell Health

    May 31, 2023 · With 20/200 vision, you can see at 20 feet what a person with 20/20 vision sees at 200 feet. Or, your 20-degree field allows for seeing only right in front of you. This article explains why not all blindness meets the criteria to be declared legally blind, and what is needed for that to be the case.

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  8. www.hopkinsmedicine.org › health › wellness-andLow Vision: What You Need to Know as You Age

    When someone says they have 20/20 “perfect vision”, this is really a measurement of best-corrected visual acuity (BCVA).

  9. visioneyeinstitute.com.au › eyematters › what-doesWhat does 20/20 vision actually mean? - Vision Eye Institute

    Mar 2, 2020 · The most widely accepted definition, from the ICD-10-AM, defines blindness as having visual acuity worse than 20/400 (3/60). 3 Some other organisations, including Vision Australia, are more conservative and class ‘blindness’ as having visual acuity worse than 20/200 (6/60) or field of vision of less than 20 degrees in diameter. 4

  10. goldeneyeoptometry.com › 2021/08/23 › 20-20-visionWhat is 20/20 Vision? How to Convert Diopters to a 20/20 Measure

    Aug 23, 2021 · 20/20 vision is a term used to express normal visual acuity (the clarity or sharpness of vision) measured at a distance of 20 feet. If you have 20/20 vision, you can see. clearly at 20 feet what should normally be seen at that distance.

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