Approximations of pupillary shape in high-definition video-oculography registers

Abstract

Two approximations of the pupillary shape (in laboratory environment) were developed: a nonlinear elliptic fit with outliers rejection and the assessment of the realistic amorphous shape via radial distances measurement, for the more diaphanous registers. The present methodology achieved a resolution of 10 μm/pixel. The algorithm of nonlinear elliptic fit with outliers rejection resulted a robust option for infrared reflex artifacts, whereas, radial distance measurement could lead us towards a new way of spatiotemporal analysis of pupillary dynamic.