INFLUENCE OF THE STIMULUS WIDTH ON THE CONTRAST SENSITIVITY FUNCTION IN AMBLYOPIA

  • 1 January 1979
    • journal article
    • research article
    • Vol. 18  (8) , 842-847
Abstract
The contrast sensitivity function of human subjects'' eyes with functional amblyopia was measured. A clinically significant difference was found between the amblyopic and the normal eye. The functionally amblyopic eye appears to take more information from the peripheral parts of the stimulus than the normal eye. The sensitivity of the normal eye increases linearly with increasing width of the stimulus to show a knee at a certan number of grating lines, whereafter the sensitivity remains constant. Initially the sensitivity of the amblyopic eye rises much faster with increasing stimulus width than the normal eye. In the amblyopic eye no definite linear relationship exists between width of stimulus and the contrast sensitivity, and no definite knee occurs in the curve at maximum sensitivity.