Stabilized retinal mapping of known retinal loci

Abstract

Stabilization of a test spot of light on specific portions of the retina can improve visual perimetry data that disclose the presence and extent of visual loss due to eye disease. In conventional visual perimetry, small test spots of light are displayed at various spatial locations in the visual field to determine the local sensitivity of the retina. These methods are subject to errors from eye movements which can shift the spatial relationships between the test display and known retina loci. A method of stabilizing test displays on the human retina and of relating this stabilized test display to known retinal loci is described. The stabilized retinal mapping has higher resolution than conventional maps, minimizes eye movement errors, reduces fatigue, and shortens testing time. The current method for stabilizing the test points on the retina uses a dual Purkinje tracker, which limits the application if there is yellowing of the eye lens with age, corneal abnormalities, or a small pupil.<>