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Título: | Shape of stars and optical quality of the human eye |
Autor: | Navarro, Rafael CSIC ORCID; Losada Binué, Mª Ángeles CSIC | Palabras clave: | Star images Gaussian spot |
Fecha de publicación: | feb-1997 | Editor: | Optical Society of America | Citación: | Journal of the Optical Society of America A 14(2):353-9 (1997) | Resumen: | Star images are entoptic phenomena that most people can perceive when looking at bright point sources in darkness. Diffraction and/or ocular aberrations seem to be a plausible cause for the star patterns, but to our knowledge no objective recordings of retinal optical images showing these characteristic patterns have been reported before. We have projected a small Gaussian spot of light onto the retina and registered the aerial image formed externally through a fully dilated pupil $one-and-a-half-pass method [J. Opt. Soc. Am. A 12, 2385 (1995)]%. We have verified that, for fully dilated pupils (.9 mm), the blur caused by the finite size of the Gaussian spot is small. Consequently, these aerial images are a reasonably good approximation of the (inverted) optical point-spread function of the eye. These objectively recorded images displayed the distinctive radiating patterns of star images, which were compared with subjective patterns sketched out by the same observers. A strikingly close match was found between the objective and the subjective patterns of the same eyes. In addition, we computed the diffraction patterns produced by a simple schematic model of the suture lines of the anterior lens surface, also obtaining star-shaped images. These results support the commonly accepted hypothesis of a purely optical origin of subjective star images. © 1997 Optical Society of America [S0740-3232(97)00402-X]. | Descripción: | Contiene: fórmulas y 7 ilustraciones. | Versión del editor: | http://www.opticsinfobase.org/abstract.cfm?URI=josaa-14-2-353 | URI: | http://hdl.handle.net/10261/29954 | DOI: | 10.1364/JOSAA.14.000353 | ISSN: | 1084-7529 |
Aparece en las colecciones: | (CFMAC-IO) Artículos |
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BC81CCED-BF80-A7A1-52EBD4BA14E798AF_1697.pdf | 630,96 kB | Adobe PDF | Visualizar/Abrir |
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