Retinal Illuminance and the Relationship with Color

Abstract

The pupillary reflex reacts to the light dilating or contracting the pupil depending on different factors like the image, or the light. These changes on the size of the pupil let us to identify the amount of light that impacts into the eye. To correlate the light and the pupillary contraction it is necessary define the Retinal Illuminance, which the product of luminance, pupillary area and a constant that belongs to the dispersion of the light on the ocular media. This research is focused on the Retinal Illuminance in presence of color (RGB). For the study it was developed a stimulator capable of control the luminance in order to make it constant for each color. The study was made in a dark environment on healthy persons between 25 and 50 years old following the guidelines of Helsinki Declarations. It have been measured the maximum contraction of the pupil for each subject and each color. The results exhibited that Retinal Illuminance is color dependent and not only luminance dependent. The study was made on healthy subjects, this study can help us to establish which are the normal values of Retinal Illuminance to detect diseases that affect the color vision.