Document Detail


The effect of spherical and other aberrations upon the modulation transfer of the defocussed human eye.
MedLine Citation:
PMID:  10070545     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Relative modulation transfer is defined as contrast sensitivity under blur normalised to contrast sensitivity at optimum focus. Measured relative modulation transfer exceeds relative modulation transfer as calculated for aberration free optics at higher spatial frequencies (> 2 cpd). The contribution of spherical aberration to this discrepancy was studied. In the case of positive blur, spherical aberration increases relative modulation transfer for spatial frequencies of approximately 4 cpd and over. However, spherical aberration does not explain the entire difference between measured and calculated relative modulation transfer. Chromatic aberration does not provide a noticeable additional explanation. With negative blur, spherical aberration increases the relative modulation transfer much more. The effect of other monochromatic aberrations on relative modulation transfer is discussed.
Authors:
N M Jansonius; A C Kooijman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)     Volume:  18     ISSN:  0275-5408     ISO Abbreviation:  Ophthalmic Physiol Opt     Publication Date:  1998 Nov 
Date Detail:
Created Date:  1999-04-05     Completed Date:  1999-04-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8208839     Medline TA:  Ophthalmic Physiol Opt     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  504-13     Citation Subset:  IM    
Affiliation:
Laboratory of Experimental Ophthalmology, University of Groningen, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Contrast Sensitivity / physiology*
Humans
Lens, Crystalline / physiology*
Models, Theoretical
Optics and Photonics
Pupil / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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