Normal vision occurs when light is focused directly on the retina rather than in front or behind it.
Review Date:
8/22/2008
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.