A new microelectrode positioner for electrophysiology in the intact mammalian eye.

This report describes a new microelectrode positioner for intraocular electrophysiology. This positioner provides fine movement along the axis of electrode advance and in two planes at right angles to the axis of advance. Rotation occurs around the scleral insertion point. In addition, this new positioner incorporates a closed chamber system that allows maintenance of constant intraocular pressure (IOP) as well as the ability to set the IOP at any desired level.