Evaluation of the SPP-II test

Abstract

Fifty healthy eyes, normal for their age, as well as 50 diseased eyes have been examined by means of a test battery (Nagel anomaloscope, AO-HRR, TMC, SPP-I, FM 100-Hue, Standard and Desaturated Panel D-15) and with the SPP-II test. SPP-II results were in good agreement with the ‘synoptic diagnoses’ from the test battery. Furthermore, in the majority of cases the SPP-II test can differentiate between the predominant and the concomitant color deficiency. ‘Scotopisation’ in the test-battery was covered to about 50% by the SPP-II test. There were no false-positive scotopic results. The most sensitive BY symbols were R4, L4 and L6, and the most sensitive RG symbols Rll and L12. The scotopic symbol R7 is more sensitive than R12. The unmarked symbol R5 is sensitive to acquired RG defects. The SPP-II test has proved to be an excellent clinical color test and is highly recommended for inclusion in test batteries for acquired color defects.