Intraocular pressure changes during tonography. Studies of other pressure tests in rabbit and enucleated human eyes by closed electric manometry.

The intraocular pressure responses in living rabbit and enucleated human eyes during tonography, suction-cup and bulbar pressure tests were continuously recorded by closed electric manometry. The tonography tests in rabbits produced an initial rapid rise in pressure, followed by a slight decline during tonography and a sharp drop to a level lower than the initial pressure as soon as tonography was discontinued; recovery to the initial pressure level was gradual. Increasing the plunger weights made the responses more marked. Enucleated human eyes showed similar results except, of course, there was no recovery to the initial pressure level. Similar pressure responses were produced in the suction cup and bulbar pressure tests. Our data showed that the manometric curves in living rabbit and enucleated human eyes during compression are of the same type.