Piñero DP, de Fez D, Cabezos I, et al. - Researchers conducted this prospective study to assess the intrasession repeatability of pupil size measurements provided by a multidiagnostic platform in a large sample of healthy eyes. They involved 100 healthy eyes of 100 patients, with ages ranging from 23 to 65 years old. After a complete eye exam, repeated pupil size measures under photopic (P, 220 lx), mesopic (M, 160 lx), low mesopic (L, 70 lx), and scotopic conditions (S, 1 lx) have been obtained with the VX120 system (Visionix-Luneau Technologies, Chartres, France). Similarly, in a total of 75 pupils, pupil size was also measured once in the fellow eye. Under scotopic, low mesopic and photopic conditions, the VX120 system can provide accurate measurements of pupil size, with a relative limitation under mesopic conditions. When assessing the mesopic pupillary response, it is recommended to obtain three consecutive measurements to reduce the possible variability between the first and second measures.