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Journal of Biomedical Optics • Open Access

Influence of loupes and age on the near visual acuity of practicing dentists
Author(s): Martina Eichenberger; Philippe Perrin; Klaus Neuhaus; Adrian Lussi; Ueli Bringolf

Paper Abstract

We evaluated the near visual acuity of 40 dentists and its improvement by using different magnification devices. The acuity was tested with miniaturized E-optotype tests on a negatoscope under the following conditions: 1. natural visual acuity, 300 mm; 2. single lens loupe, 2×, 250 mm; 3. Galilean loupe, 2.5×, 380 mm; and 4. Keplerian loupe, 4.3×, 400 mm. In part 1, the influence of the magnification devices was investigated for all dentists. The Keplerian loupe obtained the highest visual acuity (4.64), followed by the Galilean loupe (2.43), the single lens loupe (1.42), and natural visual acuity (1.19). For part 2, the dentists were classified according to their age (

Paper Details

Date Published: 1 March 2011
PDF: 6 pages
J. Biomed. Opt. 16(3) 035003 doi: 10.1117/1.3555190
Published in: Journal of Biomedical Optics Volume 16, Issue 3
Show Author Affiliations
Martina Eichenberger, Univ. Bern (Switzerland)
Philippe Perrin, Univ. Bern (Switzerland)
Klaus Neuhaus, Univ. Bern (Switzerland)
Adrian Lussi, Univ. Bern (Switzerland)
Ueli Bringolf, Consultant (Switzerland)

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