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Optics of astigmatism and retinal image quality

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Vilaseca Ricart, MeritxellMés informacióMés informacióMés informació
Díaz-Doutón, Fernando
Luque, Sergio Oscar
Aldaba Arévalo, MikelMés informacióMés informacióMés informació
Arjona Carbonell, Mª MontserratMés informacióMés informació
Pujol Ramo, JaumeMés informacióMés informacióMés informació
Document typePart of book or chapter of book
Defense date2012-02
PublisherINTECH
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
In the first part of this chapter, the optical condition of astigmatism is defined. The main causes and available classifications of ocular astigmatism are briefly described. The most relevant optical properties of image formation in an astigmatic eye are analysed and compared to that of an emmetropic eye and an eye with spherical ametropia. The spectacle prescription and axis notation for astigmatism are introduced, and the correction of astigmatism by means of lenses is briefly described. The formation of the retinal image for extended objects and the related blurring are also analysed, and the real limits of tolerance of uncorrected astigmatism are provided. Simulations of retinal images in astigmatic eyes, obtained by means of commercial optical design software, are also presented. Finally, the clinical assessment of retinal image quality by means of wavefront aberrometry and double-pass systems in eyes with astigmatism is presented, and current trends in research related to this topic are highlighted.
CitationVilaseca, M. [et al.]. Optics of astigmatism and retinal image quality. A: "Astigmatism – Optics, physiology and management". INTECH, 2012, p. 33-56. 
URIhttp://hdl.handle.net/2117/15748
ISBN978-953-51-0230-4
Publisher versionhttp://www.intechopen.com/books/show/title/astigmatism-optics-physiology-and-management
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  • GREO - Grup de Recerca en Enginyeria Òptica - Capítols de llibre [7]
  • Departament d'Òptica i Optometria - Capítols de llibre [14]
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