133449 20260219090932.0 doi 10.3390/jimaging10040089 sideral 138132 ART-2024-138132 eng Ávila, Francisco J. Universidad de Zaragoza (orcid)0000-0002-9068-7728 Subjective Straylight Index: A Visual Test for Retinal Contrast Assessment as a Function of Veiling Glare 2024 Access copy available to the general public Unrestricted Spatial aspects of visual performance are usually evaluated through visual acuity charts and contrast sensitivity (CS) tests. CS tests are generated by vanishing the contrast level of the visual charts. However, the quality of retinal images can be affected by both ocular aberrations and scattering effects and none of those factors are incorporated as parameters in visual tests in clinical practice. We propose a new computational methodology to generate visual acuity charts affected by ocular scattering effects. The generation of glare effects on the visual tests is reached by combining an ocular straylight meter methodology with the Commission Internationale de l’Eclairage’s (CIE) general disability glare formula. A new function for retinal contrast assessment is proposed, the subjective straylight function (SSF), which provides the maximum tolerance to the perception of straylight in an observed visual acuity test. Once the SSF is obtained, the subjective straylight index (SSI) is defined as the area under the SSF curve. Results report the normal values of the SSI in a population of 30 young healthy subjects (19 ± 1 years old), a peak centered at SSI = 0.46 of a normal distribution was found. SSI was also evaluated as a function of both spatial and temporal aspects of vision. Ocular wavefront measures revealed a statistical correlation of the SSI with defocus and trefoil terms. In addition, the time recovery (TR) after induced total disability glare and the SSI were related; in particular, the higher the RT, the greater the SSI value for high- and mid-contrast levels of the visual test. No relationships were found for low contrast visual targets. To conclude, a new computational method for retinal contrast assessment as a function of ocular straylight was proposed as a complementary subjective test for visual function performance. info:eu-repo/grantAgreement/ES/DGA-FEDER/E44-23R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 3.3 2024 0.662 2024 Computer Graphics and Computer-Aided Design 2024 Q1 Electrical and Electronic Engineering 2024 Q2 Radiology, Nuclear Medicine and Imaging 2024 Q2 Computer Vision and Pattern Recognition 2024 Q2 6.7 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Casado, Pilar Universidad de Zaragoza Marcellán, Mª Concepción Universidad de Zaragoza (orcid)0000-0002-7516-3029 Remón, Laura Universidad de Zaragoza (orcid)0000-0002-3979-4528 Ares, Jorge Universidad de Zaragoza (orcid)0000-0002-1124-0363 Collados, Mª Victoria Universidad de Zaragoza (orcid)0000-0002-3299-253X Otín, Sofía Universidad de Zaragoza (orcid)0000-0002-6591-0801 2002 647 Universidad de Zaragoza Dpto. Física Aplicada Área Óptica 10, 4 (2024), 89 [12 pp.] JOURNAL OF IMAGING 2313-433X The visual acuity charts based on SI to obtain the SSF https://github.com/favilago/SSI 5413136 http://zaguan.unizar.es/record/133449/files/texto_completo.pdf Versión publicada 2716292 http://zaguan.unizar.es/record/133449/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:133449 articulos driver 2026-02-19-09:00:18 ARTICLE