Date of Award
Master of Science in Vision Science
Oscar W. Richards
Included among color vision testing instruments are the Nagel anomaloscope and the Pickford-Nicholson anomaloscope. The Nagel is a spectral instrument whereas the Pickford-Nicholson uses filters. This paper examines how closely the two instruments actually correspond. It is concluded that both instruments do quantitatively yield similar results on both normals and color deficients. The standard deviations of both the means and ranges on the two instruments are equal, at the .02 level of significance .
Susumi, Marlene J. and Rosenstein, Diane R., "A comparative evaluation of anomaloscopes: Pickford-Nicholson & Nagel" (1978). College of Optometry. 502.