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Refraction test - Results

Alternative Names

Eye test - refraction; Vision test - refraction

Normal Values:

A normal value is 20/20 vision (perfect vision - able to read 3/8 inch letters at 20 feet). A small type size is also used to determine normal near vision.

What abnormal results mean:

Abnormal results may be due to:

Astigmatism
Hyperopia (farsightedness)
Myopia (nearsightedness)
Presbyopia (inability to focus on near objects that develops with age)

Additional conditions under which the test may be performed:

Normal vision

Reviewed last on: 1/21/2009
Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA . Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Yanoff M, Duker JS, Augsburger JJ, et al. Ophthalmology. 2nd ed. St. Louis, Mo: Mosby; 2004:71-77.

Behrman RE. Nelson Textbook of Pediatrics. 17th ed. Philadelphia, Pa: WB Saunders; 2004; 2084-2085.

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