Abstract

KRONBAUER, Airton Leite; SCHOR, Paulo; CHAMON, Wallace  and  CARVALHO, Luis Alberto Vieira de. Vision measurement in candelas. Arq. Bras. Oftalmol. [online]. 2011, vol.74, n.2, pp. 91-96. ISSN 0004-2749.  http://dx.doi.org/10.1590/S0004-27492011000200004.

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.

Keywords : Vision tests; Visual acuity; Visual perception; Form perception; Pattern recognition, visual; International system of units; Models, theoretical; Psychophysics; Photic stimulation.