Ocular tonometer for estimation of intraocular pressure using fr

Details Ocular tonometer for estimation of intraocular pressure using fr Ocular tonometer for estimation of intraocular pressure using fr

1992-08-20

1993-03-30

Shay, Randy C.

Surgery

Truss

Pad

73 79, A61B 316

Patent

active

051974738

ABSTRACT:
A ball falls freely onto an eyelid-covered cornea, and the kinetic energy of the ball is conversed into a force causing deformation of the cornea. The amount of the ball rebound varies depending on the amount of intraocular pressure and the latter is judged against the amount of the ball rebound.
An ocular tonometer has a tubular housing, wherein provision is made for a free falling of the ball kept by a special holder at one of the ends of the housing. The opposite end of the housing is placed on the eyelid so that the falling ball interacts with the cornea through the eyelid. The amount of the ball rebound characteristic of the amount of intraocular pressure, is registered either with the aid of a scale or by a special measuring instrument.

REFERENCES:
patent: 3038330 (1962-06-01), Cirche
patent: 4336710 (1982-06-01), Miller

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