Non-contact type tonometer

Details Non-contact type tonometer Non-contact type tonometer

1999-06-18

2000-03-28

Manuel, George

Surgery

Diagnostic testing

Testing aqueous humor pressure or related condition

600405, A61B 3016

Patent

active

06042544&

ABSTRACT:
A non-contact type tonometer is disclosed, wherein a fluid blowing device blows a compressed air against a cornea of an examinee's eye, a deformation detection device detects a corneal deformed state caused by the fluid, a pressure detection device detects the fluid pressure to be blown by the fluid blowing device, a memory samples data on time-varying pressure detected by the pressure detection device at predetermined time intervals and stores them, and a calculation device takes a predetermined amount of pressure data from those stored in the memory, the pressure data being within a predetermined duration determined relative to the reference time at which a predetermined deformation of the cornea is detected by the deformation detection device. Then, the calculation device calculates an intraocular pressure of the examinee's eye based on the taken pressure data.

REFERENCES:
patent: 4559359 (1985-12-01), Matier
patent: 4621644 (1986-11-01), Eilers
patent: 4951670 (1990-08-01), Tamaka et al.
patent: 5279300 (1994-01-01), Miwa et al.
patent: 5502521 (1996-03-01), Katou
patent: 5671737 (1997-09-01), Harosi

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