Prevalence and Incidence of Refractive Eye Disorders
Prevalance of Refractive Eye Disorders:
120 million people ... see also overview of Refractive Eye Disorders.
Prevalance Rate:
approx 1 in 2 or 44.12% or 120 million people in USA [Source statistic for calcuation: "120 million people" -- see also general information about data sources]
Prevalance of types of Refractive Eye Disorders:
For details see prevalence of types of Refractive Eye Disorders analysis; summary of available prevalence data:
- Myopia: 70 million Americans; over 25 percent of all adult Americans.
- Hyperopia: 22.4% of population self-reported having long-sightedness in Australia 2001 (ABS 2001 National Health Survey, Australia’s Health 2004, AIHW)
- Astigmatism: 45 million Americans (dubious estimate based on "two thirds of people with myopia also have astigmatism")
- more types of Refractive Eye Disorders...»
Refractive Eye Disorders Prevalence: Book Excerpts
Prevalence/Incidence of Refractive Eye Disorders: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about the prevalence and/or incidence of Refractive Eye Disorders.
Refractive Error:
Refractive Error - epidemiology
(The 5-Minute Pediatric Consult)
Because of the age-related growth of the optic components of the eye, prevalence of refractive errors varies during childhood. At birth, usual median refractive error is low hyperopia, approximately +2.00 diopters. In adults, the median is emmetropia. The incidence of refractive error requiring correction increases with age.
Refractive Error - prevalence
- In school-aged children in the US, 7–25% have refractive error significant enough to affect visual acuity. ~25% of the adult population of the US have myopia, and ~5% have hyperopia.
- Some ethnic groups have increased prevalence of myopia, including people of Native American, Chinese, and Japanese descent.
» READ BOOK EXCERPT ONLINE »
Source: The 5-Minute Pediatric Consult, 2008
About prevalence and incidence statistics:
The term 'prevalence' of Refractive Eye Disorders usually refers to the estimated population
of people who are managing Refractive Eye Disorders at any given time.
The term 'incidence' of Refractive Eye Disorders refers to the annual diagnosis rate,
or the number of new cases of Refractive Eye Disorders diagnosed each year.
Hence, these two statistics types can differ:
a short-lived disease like flu can have high annual incidence but low prevalence,
but a life-long disease like diabetes has a low annual incidence but high prevalence.
For more information see about prevalence and incidence statistics.
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