Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1997-02-21
1998-05-19
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351208, 600401, A61B 310
Patent
active
057542732
ABSTRACT:
A non-contact tonometer includes a fixation axis intersecting the corneal vertex, and a fluid axis angularly displaced from the fixation axis to form a non-zero angle therewith. A nozzle is axially aligned along the fluid axis for discharging a fluid pulse along the fluid axis to the corneal surface of the eye. In a preferred embodiment, the fixation and fluid axes reside in the same vertical plane, with the fluid axis below the fixation axis approaching the eye. Alignment and applanation detection optics are arranged coplanar with the fluid axis.
REFERENCES:
patent: 4834527 (1989-05-01), Kobayaski
patent: 4881807 (1989-11-01), Luce et al.
Leica Inc.
Mai Huy
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