{"id":16951,"date":"2021-08-29T10:17:01","date_gmt":"2021-08-29T10:17:01","guid":{"rendered":"https:\/\/www.optometrists.org\/?page_id=16951"},"modified":"2021-08-29T10:17:01","modified_gmt":"2021-08-29T10:17:01","slug":"emmetropia","status":"publish","type":"page","link":"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-exams\/eye-exams\/emmetropia\/","title":{"rendered":"Emmetropia"},"content":{"rendered":"

Over 50% of all people have emmetropia \u2026 don\u2019t worry, this just means you have perfect 20\/20 vision.<\/b><\/h2>\n

If you don’t need glasses or contact lenses to see clearly, you have clear vision. However, it is important to note that clear vision does not always mean your eyes are healthy.<\/p>\n

Many eye conditions, including glaucoma<\/a> and macular degeneration<\/a> may not affect vision right away, even though eye damage has already occurred.<\/p>\n

Eye exams<\/a> are still vital, even if you have clear 20\/20 vision.<\/p>\n

What is emmetropia?<\/b><\/h2>\n

Emmetropia is the clinical term used by eye doctors to describe a person with perfect vision, also known as \u201820\/20 sight\u2019. This ideal condition describes an eye that has no refractive error or visual defects.<\/p>\n

The light that enters an emmetropic eye focuses perfectly on the retina<\/a>, producing a precise, clear and crisp image. Emmetropia is naturally occurring, and perfect vision is achieved without the help of corrective lenses or even squinting.<\/p>\n

What is ametropia?<\/b><\/h2>\n

A person who is not emmetropic, is called ametropic. An ametropic eye contains one or more refractive errors. Myopia<\/a>, hyperopia<\/a>, astigmatism<\/a> and presbyopia<\/a> are all examples of refractive errors.<\/p>\n

Myopia (nearsightedness)<\/b>: Distance vision is blurry while near vision is clear. Corrective lenses in the form of glasses or contact lenses and programs of myopia management are the common treatments for this condition.<\/p>\n

Hyperopia (farsightedness)<\/b>: Near vision is blurry while distance vision is clear. Corrective lenses such as eyeglasses or contact lenses are the most common treatment for this condition.<\/p>\n

Astigmatism: <\/b>Both near and distance vision are blurry. This condition occurs when the cornea is irregularly shaped, and generally accompanies myopia or hyperopia. Specific optical powers are added to lens prescriptions to correct the astigmatism.<\/p>\n

All three of these conditions can also be treated with laser refractive surgery, depending on the age of the patient and other health factors.<\/p>\n

If your vision is not clear, contact an eye doctor near you<\/a><\/b> for a comprehensive eye exam<\/b>.<\/p>\n

SEE RELATED: <\/b>The Importance of Pupil Exams<\/a><\/p>\n\n\t

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