Other

Francis J Porter

Jon Ballou

August O Westner

A tonometer for measuring intraocular pressure of an eye is described. The tonometer includes an eyepiece having a conduit extending through an outer surface. The outer surface is concave shaped to conform to an eyeball. The tonometer also includes a plunger extending through the conduit having a head at a first end and having a probe at a second end which extends beyond the outer surface of the eyepiece so as to contact the eyeball when the eyepiece is positioned to conform to the eyeball. The tonometer also includes a fluid reservoir having a top and a bottom. The bottom of the reservoir is sealed by a membrane that is in juxtaposition with the head of the plunger. In addition, the tonometer includes an indicator positioned in the fluid reservoir for measuring a level of fluid in the reservoir. The level of fluid in the reservoir is proportional to an intraocular pressure of the eyeball when the eyepiece is positioned to conform to the eyeball.

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Millis, MA, United States of America

Francis J Porter