Nearsightedness

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Dictionary Meaning and Definition on 'Nearsightedness'

Nearsightedness Meaning and Definition from WordNet (r) 2.0
    nearsightedness n : (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred [syn: myopia, shortsightedness] [ant: hyperopia]
Nearsightedness Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Nearsightedness \Near"sight`ed*ness\, n. See Myopic, and Myopia.
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Wikipedia Meaning and Definition on 'Nearsightedness'


Myopia (Greek: μυωπία, muōpia, "nearsightedness" (Am. Eng.), "shortsightedness" (Brit. Eng.)) is a refractive defect of the eye in which collimated light produces image focus in front of the retina when accommodation is relaxed.

Eye care professionals most commonly correct myopia through the use of corrective lenses, such as glasses or contact lenses. It may also be corrected by refractive surgery, but this does have many risks and side effects. The corrective lenses have a negative optical power (i.e. are concave) which compensates for the excessive positive diopters of the myopic eye.

Myopia has been classified in various manners.

Borish and Duke-Elder classified myopia by cause:

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Nearsightedness Sample Sentences in News


  • Nearsightedness increases with level of education and longer schooling
    Education and behavior have a greater impact on the development of nearsightedness than do genetic factors: with each school year completed, a person becomes more nearsighted. Read more on this news related to 'Nearsightedness'
  • Vision Impairment And Nearsightedness More Pronounced In Those With Higher Levels Of Education
    April Flowers for redOrbit.com - Your Universe Online A new study from the Mainz University Medical Center demonstrates that education and behavior play as large a role in the development of myopia, or nearsightedness , as genetic factors do. The findings, published in Ophthalmology , reveal that people become more nearsighted with each year of schooling completed Read more on this news related to 'Nearsightedness'
  • Study shows correlation between education and nearsightedness
    Education and behavior have a greater impact on the development of nearsightedness than do genetic factors: With each school year completed, a person becomes more nearsighted. Read more on this news related to 'Nearsightedness'

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