Refraction test : Normal Values & Results (Eye test - refraction, Vision test

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You are here : AllRefer.com > Health > Tests & Exams > Refraction test : Normal Values & Results

Refraction test

Alternate 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 do 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:

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Refraction test : Definition
Refraction test : Why is the Test Performed?
Refraction test : How is the Test Performed?
Refraction test : How to Prepare for the Test?
Refraction test : How will the Test Feel?
Refraction test : Risks
Refraction test : Special Considerations
Refraction test : Normal Values
Refraction test : What do Abnormal Results Mean?
Refraction test : References
Refraction test : Pictures & Images
Normal vision

Review Date : 1/21/2009
Reviewed By : 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.

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