Surgery – Diagnostic testing – Testing aqueous humor pressure or related condition
Patent
1998-04-03
1999-09-21
O'Connor, Cary
Surgery
Diagnostic testing
Testing aqueous humor pressure or related condition
600399, 600405, 351212, A61B 316
Patent
active
059546450
ABSTRACT:
A non-contact tonometer is improved by providing a non-telecentric applanation detection system enabling relaxation of instrument alignment requirements during testing. In a preferred embodiment, the applanation detection system comprises an emitter for directing an obliquely incident beam of light for reflection by the cornea, and a detector array having a plurality of photosensitive detector array elements located to receive corneally reflected light. The detector array generates a plurality of signal curves for light energy received at different locations on the array as a function of time, and the signal curves are evaluated to determine an optimal signal curve which best indicates the moment of applanation.
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Leica Microsystems Inc.
Marmor II Charles
O'Connor Cary
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