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Título: | Influence of adaptive-optics ocular aberration correction on visual acuity at different luminances and contrast polarities |
Autor: | Marcos, Susana CSIC ORCID ; Sawides, L. CSIC ORCID; Gambra, Enrique CSIC ORCID; Dorronsoro, Carlos CSIC ORCID | Palabras clave: | Adaptive optics Ocular aberrations Psychophysics Visual acuity Luminance Contrast polarity |
Fecha de publicación: | 6-oct-2008 | Editor: | Association for Research in Vision and Ophthalmology | Citación: | Journal of Vision 8(13): 1-12 (2008) | Resumen: | We evaluated the visual benefit of correcting astigmatism and high-order aberrations with adaptive optics (AO) on visual acuity (VA) measured at 7 different luminances (ranging from 0.8 to 50 cd/m2) and two contrast polarities (black letters on white background, BoW, and white letters on black background, WoB) on 7 subjects. For the BoW condition, VA increased with background luminance in both natural and AO-corrected conditions, and there was a benefit of AO correction at all luminances (by a factor of 1.29 on average across luminances). For WoB VA increased with foreground luminance but decreased for the highest luminances. In this reversed polarity condition AO correction increased VA by a factor of 1.13 on average and did not produce a visual benefit at high luminances. The improvement of VA (averaged across conditions) was significantly correlated (p = 0.04) with the amount of corrected aberrations (in terms of Strehl ratio). The improved performance with WoB targets with respect to BoW targets is decreased when correcting aberrations, suggesting a role of ocular aberrations in the differences in visual performance between contrast polarities. | Descripción: | 12 pages, 10 figures. | Versión del editor: | http://journalofvision.org/8/13/1/ | URI: | http://hdl.handle.net/10261/8559 | DOI: | 10.1167/8.13.1 | ISSN: | 1534-7362 |
Aparece en las colecciones: | (CFMAC-IO) Artículos |
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Marcos-2008-jov-8-13-1.pdf | 1,3 MB | Adobe PDF | Visualizar/Abrir |
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