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Optical Engineering

Optical properties of miniaturized endoscopes for ophthalmic use
Author(s): Pascal O. Rol; Reinhard Jenny; Dominik Beck; Franz Fankhauser; Peter F. Niederer
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Paper Abstract

Endoscopes for use in ophthalmology can now be manufactured with overall intraocular diameters smaller than 0.89 mm. Endoscopes based on gradient-index lenses yield a higher resolution than those making use of ordered fiber bundles having the same diameter. Likewise, endoscopes with optical elements having a diameter of 0.50 mm yield a higher resolution than those with smaller diameter (0.35 mm). Thanks to the miniaturization, a working channel can also be integrated within the tube of the endoscope instead of being a part of the illumination bundle. This allows the design of new endoscopic devices including various surgical instruments. Preference is given to an endoscope with an integrated aspiration/irrigation system or with a fiber for laser therapy. The potential phototoxicity of these systems is briefly discussed.

Paper Details

Date Published: 1 July 1995
PDF: 8 pages
Opt. Eng. 34(7) doi: 10.1117/12.204800
Published in: Optical Engineering Volume 34, Issue 7
Show Author Affiliations
Pascal O. Rol, Univ. Eye Clinic (Zurich) (Switzerland)
Reinhard Jenny, Volpi AG (Switzerland)
Dominik Beck, Swiss Federal Institute of Technology (Switzerland)
Franz Fankhauser, Univ. of Bern (Switzerland)
Peter F. Niederer, Swiss Federal Institute of Technology (Switzerland)

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