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Proceedings Paper

Interferometric measurement of the axial length of the eye
Author(s): Sverker Hard; Per-Ola Fuxin; Dan Gerhardsson; Per-Arne Torstensson; Tomas Nilsson; Johan Sjostrand
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Paper Abstract

A fast and accurate fiberoptic-based interferometer for non- contact measurements of the axial length of the eye was constructed and tested. A novelty of the interferometer design is the use of a diffractive, bifocal lens, which simultaneously focuses on the cornea and on the retina. A superluminescent light emitting diode with a coherence length of 30 micrometers is used as light source. The axial length of the eye is measured by rapidly translating a reference mirror a distance covering the axial length. The estimated accuracy of a measurement is about 100 micrometer, a number which compares well with those of conventional ultrasonic-based measurements.

Paper Details

Date Published: 4 February 1999
PDF: 3 pages
Proc. SPIE 3564, Medical Applications of Lasers in Dermatology, Cardiology, Ophthalmology, and Dentistry II, (4 February 1999); doi: 10.1117/12.339166
Show Author Affiliations
Sverker Hard, Chalmers Univ. of Technology (Sweden)
Per-Ola Fuxin, Chalmers Univ. of Technology (Sweden)
Dan Gerhardsson, Chalmers Univ. of Technology (Sweden)
Per-Arne Torstensson, Radians Innova AB (Sweden)
Tomas Nilsson, Radians Innova AB (Sweden)
Johan Sjostrand, Sahlgrenska Univ. Hospital/Goeteborg Univ. (Sweden)

Published in SPIE Proceedings Vol. 3564:
Medical Applications of Lasers in Dermatology, Cardiology, Ophthalmology, and Dentistry II
Gregory B. Altshuler; Stefan Andersson-Engels; Reginald Birngruber; Peter Bjerring; Adolf Friedrich Fercher; Herbert J. Geschwind; Raimund Hibst; Herbert Hoenigsmann; Frederic Laffitte; Hericus J. C. M. Sterenborg, Editor(s)

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