Journal article
Variability of the ocular component measurements in children using A-scan ultrasonography
Optometry and vision science, v 81(1), pp 35-43
Jan 2004
PMID: 14747759
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Knowledge of the precision with which the various ocular components can be measured with available techniques is vital to our ability to track changes in the anatomy of the eye in relation to the development of refractive error. Corneal touch A-scan ultrasound measurements were obtained by either an instrument-mounted or by a hand-held method on 469 children aged 6 to 11 years at their enrollment into the Correction of Myopia Evaluation Trial. Variability of measurements was calculated for overall axial length, anterior chamber depth, lens thickness, and vitreous chamber depth. The mean variability of overall axial length was 0.062 +/- 0.043 mm and 0.061 +/- 0.056 mm for the right and left eyes, respectively. Mean variability of the ocular component measures was similar. The mean variability was not influenced by the age, gender, level of myopia, or residual accommodation of the subjects. Statistically significant differences between the instrument-mounted and the hand-held method and among certain ethnic groups were found, but the differences were not of a magnitude to be clinically significant. A-scan ultrasonography is sensitive to changes in the axial length and vitreous chamber depth equivalent to 0.25 D and is therefore a useful technique to assess changes in these ocular components in children. The precision of lens thickness is poorer than the equivalent of 1.0 D, and, therefore, A-scan may not be sufficiently precise to be useful in studies of active accommodation or lens growth.
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Details
- Title
- Variability of the ocular component measurements in children using A-scan ultrasonography
- Creators
- Daniel Kurtz - New England College of OptometryRuth MannyMohamed HusseinCOMET Study GroupMitchell Scheiman - Pennsylvania College of Optometry (PCO)
- Publication Details
- Optometry and vision science, v 81(1), pp 35-43
- Publisher
- Lippincott
- Grant note
- EY11756 / NEI NIH HHS EY11754 / NEI NIH HHS EY11740 / NEI NIH HHS EY11755 / NEI NIH HHS EY11752 / NEI NIH HHS EY11805 / NEI NIH HHS
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pennsylvania College of Optometry (PCO)
- Web of Science ID
- WOS:000188596000007
- Scopus ID
- 2-s2.0-0742322729
- Other Identifier
- 991021900187604721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Ophthalmology