The authors show an advice for checking the pupillary diameter, which was made up of a 9 black printed circles, progressively larger, with a minimum diameter of 1mm and a maximun of 9mm, affixed to wooden tongue depressor. For this study they call this gauge "Pupillometer Tongue Depressor" and it has been checked out by 180 burses for the reading accuracy of the millimeter circles with the "Pupillometer Tongue Depressor" and the effectiveness of this tool as a pupillary diameter gauge. Results yeld information that the "Pupillometer Tongue Depressor" provide an objective form for pupillary measurement, innocuous to the checked individual and an instrument of low cost and easy handling