Intraocular pressure measuring apparatus

Details Intraocular pressure measuring apparatus Intraocular pressure measuring apparatus

1998-07-01

1999-10-12

O'Connor, Cary

Surgery

Diagnostic testing

Testing aqueous humor pressure or related condition

600558, 600560, A61B 316

Patent

active

059647043

ABSTRACT:
In the non-contact intraocular pressure measuring apparatus for measuring the intraocular pressure of the eye to be examined for a suitable measurement time, after alignment of the apparatus main body with the eye to be examined is performed, the time required for charging the condenser is calculated based on current supply time for the rotary solenoid at the time of the previous intraocular pressure measurement. When the calculated charging time elapses, the desired quantity of current is supplied from the condenser to the rotary solenoid, allowing the air supply unit to spray air to the cornea of the eye to be examined. The cornea is transfigured and flattened by the sprayed air. At the same time, intraocular pressure measuring light is illuminated from the intraocular pressure measuring optical system to the flattened cornea. The reflected light therefrom is detected to calculate intraocular pressure value of the eye to be examined.

REFERENCES:
patent: 4832039 (1989-05-01), Perry et al.
patent: 4860760 (1989-08-01), Miyawaki et al.
patent: 4996990 (1991-03-01), Hideshima

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