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  2. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    The number of people globally with refractive errors has been estimated at one to two billion. [4] Rates vary between regions of the world with about 25% of Europeans and 80% of Asians affected. [4] Near-sightedness is the most common disorder. [6] Rates among adults are between 15 and 49% while rates among children are between 1.2 and 42%. [7]

  3. What Is a Cataract? These Are the Causes, Symptoms, and ... - AOL

    www.aol.com/lifestyle/cataract-causes-symptoms...

    Unlike cataracts in adults, which happen after the eyes and vision are fully developed, pediatric cataracts can have serious long-term effects on a child’s vision. That’s because a child’s ...

  4. Refractive surgery - Wikipedia

    en.wikipedia.org/wiki/Refractive_surgery

    The treatment is effective for myopia with astigmatism or otherwise irregular corneas, and reduces symptoms such as glare, halos, and night driving difficulty. [8] Refractive Lenticule Extraction (ReLEx): ReLEx "FLEx" (Femtosecond Lenticule Extraction): A femtosecond laser cuts a lenticule within the corneal stroma.

  5. Cataract surgery - Wikipedia

    en.wikipedia.org/wiki/Cataract_surgery

    Cataract surgery is one of the most cost-effective health interventions, since its economic benefits considerably exceed the cost of treatment. [ 131 ] [ 132 ] The 1998 World Health Report estimated 19.34 million people were bilaterally blind due to age-related cataracts, and that cataracts were responsible for 43% of all cases of blindness.

  6. Intraocular lens - Wikipedia

    en.wikipedia.org/wiki/Intraocular_lens

    A toric IOL is a type of toric lens used to correct preexisting corneal astigmatism at the time of cataract surgery. [20] Astigmatism can also be treated with limbal relaxing incisions or an excimer laser procedure. [21] [22] About 40% of Americans have significant astigmatism and thus may be candidates for a toric IOL. [22] Cataract surgery ...

  7. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    It is a type of refractive error, along with nearsightedness, farsightedness, and astigmatism. [4] Diagnosis is by an eye examination. [4] Presbyopia can be corrected using glasses, contact lenses, multifocal intraocular lenses, or LASIK (PresbyLASIK) surgery. [2] [7] [4] The most common treatment is glass correction using appropriate convex lens.

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