125275 20241125101148.0 doi 10.3390/app13042569 sideral 132972 ART-2023-132972 eng Sanchez-Cano, A. Universidad de Zaragoza (orcid)0000-0002-5621-1937 Method to calculate melanopic light reaching the retina depending on the optical density of an aging crystalline lens 2023 Access copy available to the general public Unrestricted Lighting studies that take into account the age of the inhabitants of an area and are related to circadian light are difficult to find. This study aims to simplify a method to approximately compute the circadian light reaching the retina based on photopic illuminance reaching the corneal plane and considering the optical density of an aging crystalline lens. As an example of this proposed method, calculations were performed with both the D65 and A standard illuminants, showing how the spectral power distribution is modified by the optical density of the crystalline lens, mainly at short wavelengths. Due to these selective wavelength absorptions of the aged lens, a significant variation in the level of daylight equivalent melanopic illuminance (EDI) is present in the retina. With levels of 200 lux at the corneal plane, these variations ranged from 204 EDI lux to 178 EDI lux for the D65 standard illuminant, and from 99 EDI lux to 101 EDI lux for the A standard illuminant for observers aged 10 and 90, respectively. In this work, we aimed to simplify the greatest possible level of calculation of melanopic light, while describing simple protocols that are easy to translate into practice. Our results will allow researchers to carry out optimized lighting designs from both the photometric and circadian perspectives considering the optical density of an aging lens. info:eu-repo/grantAgreement/ES/DGA/LMP39_21 info:eu-repo/grantAgreement/EC/H2020/956720/EU/Opto-Biomechanical Eye Research Network/OBERON This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 956720-OBERON info:eu-repo/grantAgreement/ES/MINECO-FEDER/PID2019-107058RB-I00 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.5 2023 ENGINEERING, MULTIDISCIPLINARY 44 / 181 = 0.243 2023 Q1 T1 PHYSICS, APPLIED 87 / 179 = 0.486 2023 Q2 T2 CHEMISTRY, MULTIDISCIPLINARY 115 / 231 = 0.498 2023 Q2 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 258 / 439 = 0.588 2023 Q3 T2 0.508 2023 Engineering (miscellaneous) 2023 Q2 Fluid Flow and Transfer Processes 2023 Q2 Materials Science (miscellaneous) 2023 Q2 Instrumentation 2023 Q2 Process Chemistry and Technology 2023 Q3 Computer Science Applications 2023 Q3 5.3 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Orduna-Hospital, E. Universidad de Zaragoza (orcid)0000-0003-2710-1875 Fernández-Espinosa, G. (orcid)0000-0003-1234-9712 Aporta, J. Universidad de Zaragoza (orcid)0000-0003-2968-228X 2002 647 Universidad de Zaragoza Dpto. Física Aplicada Área Óptica 13, 4 (2023), 2569 [12 pp.] Appl. sci. Applied Sciences (Switzerland) 2076-3417 1323321 http://zaguan.unizar.es/record/125275/files/texto_completo.pdf Versión publicada 2895089 http://zaguan.unizar.es/record/125275/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:125275 articulos driver 2024-11-22-12:05:23 ARTICLE