ABSTRACT Refractive data obtained by means of the Dioptron Nova Diagnostic Eye Computer were compared to data obtained by conventional clinical refraction on a group of 236 clinic patients. Spherical equivalent power data were found to average −0.32 D more for Dioptron Nova data than for clinical data, whereas spherical power data averaged −0.25 D more for Dioptron Nova data than for clinical data, and cylinder power averaged −0.12 D more for Dioptron Nova data. Dioptron and clinical data were found to be within 0.50 D of each other for 74% of eyes for spherical equivalent power, for 83% of eyes for spherical power, and for 91% of eyes for cylinder power. Cylinder axis data were found to be within 10 degrees for the two methods for 78% of eyes.
Perrigin et al. (Sun,) studied this question.