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Journal of Biomedical Optics • Open Access

Pediatric Vision Screener 1: instrument design and operation
Author(s): David G. Hunter; Deborah S. Nassif; Nadezhda V. Piskun; Robert S. Winsor; Boris I. Gramatikov; David L. Guyton

Paper Abstract

We develop the Pediatric Vision Screener (PVS) to automatically detect ocular misalignment (strabismus) and defocus in human subjects. The PVS utilizes binocular retinal birefringence scanning to determine when both eyes are aligned, with a theoretical accuracy of <1 deg. The device employs an autoconjugate, bull's-eye detector-based system to detect focus. The focus and alignment pathways are separated by both wavelength and data acquisition timing. Binocular focus and alignment are detected in rapid alternating sequence, measuring both parameters in both eyes in <0.5 sec. In this work, the theory and design of the PVS are described in detail. With objective, automated measurement of both alignment and focus, the PVS represents a new approach to screening children for treatable eye disease such as amblyopia.

Paper Details

Date Published: 1 November 2004
PDF: 6 pages
J. Biomed. Opt. 9(6) doi: 10.1117/1.1805560
Published in: Journal of Biomedical Optics Volume 9, Issue 6
Show Author Affiliations
David G. Hunter, Children's Hospital Boston (United States)
Deborah S. Nassif
Nadezhda V. Piskun, Children's Hospital Boston (United States)
Robert S. Winsor, ITT Industries (United States)
Boris I. Gramatikov, Johns Hopkins Univ (United States)
David L. Guyton, Johns Hopkins Univ. (United States)

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