| A handheld open-field infant keratometer (an american ophthalmological society thesis). | |
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MedLine Citation:
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PMID: 21212850 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To design and evaluate a new infant keratometer that incorporates an unobstructed view of the infant with both eyes (open-field design). METHODS: The design of the open-field infant keratometer is presented, and details of its construction are given. The design incorporates a single-ring keratoscope for measurement of corneal astigmatism over a 4-mm region of the cornea and includes a rectangular grid target concentric within the ring to allow for the study of higher-order aberrations of the eye. In order to calibrate the lens and imaging system, a novel telecentric test object was constructed and used. The system was bench calibrated against steel ball bearings of known dimensions and evaluated for accuracy while being used in handheld mode in a group of 16 adult cooperative subjects. It was then evaluated for testability in a group of 10 infants and toddlers. RESULTS: Results indicate that while the device achieved the goal of creating an open-field instrument containing a single-ring keratoscope with a concentric grid array for the study of higher-order aberrations, additional work is required to establish better control of the vertex distance. CONCLUSION: The handheld open-field infant keratometer demonstrates testability suitable for the study of infant corneal astigmatism. Use of collimated light sources in future iterations of the design must be incorporated in order to achieve the accuracy required for clinical investigation. |
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Authors:
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Joseph M Miller |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Transactions of the American Ophthalmological Society Volume: 108 ISSN: 1545-6110 ISO Abbreviation: Trans Am Ophthalmol Soc Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2011-01-07 Completed Date: 2011-05-19 Revised Date: 2011-07-20 |
Medline Journal Info:
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Nlm Unique ID: 7506106 Medline TA: Trans Am Ophthalmol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 77-95 Citation Subset: IM |
Affiliation:
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Department of Ophthalmology and Vision Sciences, The Mel and Enid Zuckerman College of Public Health of The University of Arizona, Tucson, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aberrometry
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instrumentation Adult Astigmatism / diagnosis* Calibration Cornea / pathology* Corneal Wavefront Aberration Diagnostic Techniques, Ophthalmological / instrumentation* Equipment Design Humans Infant |
| Grant Support | |
ID/Acronym/Agency:
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EY11155/EY/NEI NIH HHS; EY13153/EY/NEI NIH HHS; EYEY08893-12//PHS HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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