| [http://en.wikipedia.org/wiki/Eye_care_professional Eye care professionals] most commonly correct [[myopia]] through the use of [http://en.wikipedia.org/wiki/Corrective_lens corrective lenses], such as glasses or contact lenses. It may also be corrected by [http://en.wikipedia.org/wiki/Refractive_surgery refractive surgery], though there are cases of associated side effects. The corrective lenses have a negative optical power (i.e. have a net concave effect) which compensates for the excessive positive [http://en.wikipedia.org/wiki/Diopter diopters] of the myopic eye. | | [http://en.wikipedia.org/wiki/Eye_care_professional Eye care professionals] most commonly correct [[myopia]] through the use of [http://en.wikipedia.org/wiki/Corrective_lens corrective lenses], such as glasses or contact lenses. It may also be corrected by [http://en.wikipedia.org/wiki/Refractive_surgery refractive surgery], though there are cases of associated side effects. The corrective lenses have a negative optical power (i.e. have a net concave effect) which compensates for the excessive positive [http://en.wikipedia.org/wiki/Diopter diopters] of the myopic eye. |
− | The global prevalence of refractive errors has been estimated from 800 million to 2.3 billion. The incidence of myopia within sampled [[population]] often varies with age, [[country]], sex, race, [[ethnicity]], occupation, [[environment]], and other factors. Variability in testing and [[data]] collection [[methods]] makes comparisons of prevalence and progression difficult. | + | The global prevalence of refractive errors has been estimated from 800 million to 2.3 billion. The incidence of myopia within sampled [[population]] often varies with age, [[Nation|country]], sex, race, [[ethnicity]], occupation, [[environment]], and other factors. Variability in testing and [[data]] collection [[methods]] makes comparisons of prevalence and progression difficult. |
| The prevalence of myopia has been reported as high as 70–90% in some Asian countries, 30–40% in Europe and the United States, and 10–20% in Africa. Myopia is less common in African people and associated diaspora. In Americans between the ages of 12 and 54, myopia has been found to affect African Americans less than Caucasians. | | The prevalence of myopia has been reported as high as 70–90% in some Asian countries, 30–40% in Europe and the United States, and 10–20% in Africa. Myopia is less common in African people and associated diaspora. In Americans between the ages of 12 and 54, myopia has been found to affect African Americans less than Caucasians. |