Surgery – Diagnostic testing – Measuring fluid pressure in body
Patent
1998-05-27
1999-11-23
Hindenburg, Max
Surgery
Diagnostic testing
Measuring fluid pressure in body
600399, 600401, 351208, A61B 500
Patent
active
059891955
ABSTRACT:
A noncontact tonometer is provided which is capable of intercepting out-of-axis light of an index beam of light and performing precise alignment. The noncontact tonometer includes an index projecting optical system for projecting an index frontally onto a subject's eye (E) through a nozzle (12) through which gas is also is sprayed upon the eye (E). The index projecting optical system has a projection lens (27) and a diaphragm (23) disposed at a position conjugated to an end surface (F) of the nozzle (12) on the side of the projection lens (27). The diaphragm (23) intercepts rays of light traveling out of an optical axis, and enables precise alignment.
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Iijima Hiroshi
Takagi Akinari
Hindenburg Max
Kabushiki Kaisha Topcon
Marmor, IV Charles
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