Medida da visão em candelas: description of a psychophysical technique to quantify luminous intensity

Abstract

PURPOSE To develop a method and a device for vision measurement in candela (cd). Vision measurement studies are important to all visual sciences. METHODS It is a theoretical and experimental study. The details of psychophysical method and device calibration were described. Preliminary tests were performed on volunteers. RESULTS It is a simple psychophysical test and results are expressed in International System of Units. With this technical description it will be possible to reproduce the experiment in others research centers. CONCLUSION The results measured in luminous intensity (cd) are an option for visual studies. These results allow to extrapolate measurements for mathematical models and to simulate data for individual aberrometry effects.