Image quality of the human eye

20 pages, 8 figures.

Detalles Bibliográficos
Autor: Marcos, Susana
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/8687
Acceso en línea:http://hdl.handle.net/10261/8687
Access Level:acceso abierto
Palabra clave:Human eye
Retinal image quality
Refractive anomalies
Defocus
Astigmatism
Myopia
Optical aberrations
Scattering
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spelling Image quality of the human eyeMarcos, SusanaHuman eyeRetinal image qualityRefractive anomaliesDefocusAstigmatismMyopiaOptical aberrationsScattering20 pages, 8 figures.The eye is an optical instrument that projects scenes of the visual world onto the retina. It has been known for many years that the eye is far from being a perfect optical system, in particular for large pupil diameters. Refractive anomalies (defocus or astigmatism) occur frequently in the eye. In Western countries, myopia affects approximately 30% of the population, although its prevalence is much higher (> 80%) in certain Asian societies. However, the eye suffers also from other optical imperfections (called high-order aberrations), which are not typically measured in the clinic and cannot be corrected by conventional means. Like defocus, optical aberrations blur the retinal image, reducing image contrast and limiting the range of spatial frequencies available to further stages of the visual processing. The contribution of aberrations to optical degradation is typically smaller than is that of defocus or astigmatism. The blurring effect of aberrations becomes more noticeable for large pupils. For small pupil sizes, diffraction effects, associated with limited aperture size, predominate over the aberrations.Along with diffraction and aberrations, scattering also contributes to degradation of retinal image quality. Scattering occurs at the cornea and particularly in the lens. Although typically scattering is small in normal, young eyes, it is well known that it increases with age (due to changes in the crystalline lens) and after PRK refractive surgery.This study was supported by grant CAM 08.7/0010./2000 from Comunidad Autónoma de Madrid.Peer reviewedLippincott Williams & Wilkins200820082003info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501423427 bytesapplication/pdfhttp://hdl.handle.net/10261/8687reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.internat-ophthalmology.com/pt/re/ioc/fulltext.00004397-200343020-00008.htminfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/86872026-05-22T06:33:51Z
dc.title.none.fl_str_mv Image quality of the human eye
title Image quality of the human eye
spellingShingle Image quality of the human eye
Marcos, Susana
Human eye
Retinal image quality
Refractive anomalies
Defocus
Astigmatism
Myopia
Optical aberrations
Scattering
title_short Image quality of the human eye
title_full Image quality of the human eye
title_fullStr Image quality of the human eye
title_full_unstemmed Image quality of the human eye
title_sort Image quality of the human eye
dc.creator.none.fl_str_mv Marcos, Susana
author Marcos, Susana
author_facet Marcos, Susana
author_role author
dc.subject.none.fl_str_mv Human eye
Retinal image quality
Refractive anomalies
Defocus
Astigmatism
Myopia
Optical aberrations
Scattering
topic Human eye
Retinal image quality
Refractive anomalies
Defocus
Astigmatism
Myopia
Optical aberrations
Scattering
description 20 pages, 8 figures.
publishDate 2003
dc.date.none.fl_str_mv 2003
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/8687
url http://hdl.handle.net/10261/8687
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://www.internat-ophthalmology.com/pt/re/ioc/fulltext.00004397-200343020-00008.htm
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 423427 bytes
application/pdf
dc.publisher.none.fl_str_mv Lippincott Williams & Wilkins
publisher.none.fl_str_mv Lippincott Williams & Wilkins
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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