Pineda Zapata, UrielDaza Fernández, Juan Fernando2025-07-092025-07-092021Castañeda-Morales, A., & Cuevas-Arenas, H. (2021). Between educating and perverting customs: Beginnings of the cinematographic show in valle del Cauca-Colombia (1910-1930). Cases of Cali and Buga. HiSTOReLo, 13(26), 105–132. https://doi.org/10.15446/HISTORELO.V13N26.85447 Pineda-Zapata, U., & Daza-Fernández, J. F. (2021). Design and validation of a prototype to calibrate the pressure variable in tonometry. DYNA (Colombia), 88(218), 185–193. https://doi.org/10.15446/DYNA.V88N218.9171500127353https://repositorio.usc.edu.co/handle/20.500.12421/7328This paper corresponds to the results of an experimental research that to led to the design of a useful prototype for quality control of measurements in the field of tonometry to diagnose and check glaucoma. All tonometry techniques are based on Goldmann´s tonometers (GT) and the Imbert-Fick principle. Taking into account the principles and techniques of industrial metrology, the prototype could be used as a standard to calibrate the pressure readings of this class of tonometers. The developed protoype eliminates the indirect measurement that is required with current standards and facilitates a greater control of the sources of error in the measurement. The model is based on the integration of a sensor to a hydraulic model to measure pressures from 0 to 80 mmHg range, whose precision was validated through R&R studies. The precision of the prototype was validated according to the Rigel UNI-SIM standard and was complemented by calibrating 15 tonometers.encalibrationmetrologytonometryuncertainty in measurementArticle