Non-contact tonometer

Details Non-contact tonometer Non-contact tonometer

1994-01-31

1995-12-12

Sykes, Angela D.

Surgery

Truss

Pad

A61B 316

Patent

active

054740665

ABSTRACT:
An improved tonometer is disclosed having a pachymetric device means for measuring a patient's corneal thickness to allow for correction of the intraocular pressure measurement where the corneal thickness measurement deviates from a calibration mean corneal thickness. In a preferred embodiment, a single light source is pulsed just prior to intraocular pressure measurement to illuminate a central corneal section, and a pair of lateral light detector arrays are arranged to obliquely image the corneal section and generate signals which may be processed by a CPU to produce a corneal thickness measurement. If the corneal thickness measurement deviates from the calibration mean corneal thickness, the CPU calculates a thickness-corrected intraocular pressure measurement. The intraocular pressure measurement, corneal thickness measurement, and/or corrected intraocular pressure measurement may then be reported by a suitable display.

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patent: 4508121 (1985-04-01), Myers
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patent: 4883061 (1989-11-01), Zeimer
patent: 5042938 (1991-08-01), Shimozono
patent: 5056522 (1991-10-01), Matsumura
patent: 5131739 (1992-07-01), Katsuragi
patent: 5141302 (1992-08-01), Arai et al.
patent: 5148807 (1992-09-01), Hsu

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