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:
Myopia (nearsightedness)
Hyperopia (farsightedness)
Astigmatism (asymmetrical cornea)
Presbyopia (inability to focus on near objects that develops with age)
Additional conditions under which the test may be performed:
Review Date: 4/8/2005
Reviewed By: Raymond S. Douglas, M.D., Ph.D., Department of Ophthalmology, UCLA Medical Center, Los Angeles, CA. Review provided by VeriMed Healthcare Network.
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