Document Detail

Clinical refraction in three-dimensional dioptric space revisited.
MedLine Citation:
PMID:  9255815     Owner:  NLM     Status:  MEDLINE    
The traditional clinical designation of spherocylindrical power unambiguously specifies the refractive properties of a thin lens or refractive surface. This representation of dioptric power is not, however, optimum in mathematical terms, as is apparent when, for example, two spherocylindrical lens powers are added. Alternative systems have been described which are not subject to this same type of difficulty, and the essential feature of these other systems is that spherocylindrical power is defined in terms of a three-dimensional dioptric space in which the axes are usually orthogonal. The advantages of this orthogonality can be exploited in the practice of clinical refraction, provided lens powers in these three dimensions can be physically implemented. Systems using these characteristics have been introduced in the past, but the clinical community has not adopted them on a widespread basis. However, systems which take advantages of these features do have unique advantages relative to traditional clinical refraction procedures. These characteristics, and refractive procedures which exploit their advantages, are described.
T Raasch
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Optometry and vision science : official publication of the American Academy of Optometry     Volume:  74     ISSN:  1040-5488     ISO Abbreviation:  Optom Vis Sci     Publication Date:  1997 Jun 
Date Detail:
Created Date:  1997-09-30     Completed Date:  1997-09-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8904931     Medline TA:  Optom Vis Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  376-80     Citation Subset:  IM    
Ohio State University College of Optometry, Columbus, USA.
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MeSH Terms
Optics and Photonics*
Optometry / methods
Refraction, Ocular*
Refractive Errors / diagnosis,  physiopathology
Comment In:
Optom Vis Sci. 1997 Jun;74(6):339-41   [PMID:  9255812 ]

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