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Swing arm type
L-5110 INAMI Applanation Tonometer for the measurement of intraocular pressure is designed to be mounted on the microscope permanently.
When the tonometer is in use it can be swung forward just in front of the microscope and exact centering of the prism with the left eyepiece is engaged by notch. Illumination through the built-in cobalt filter projected to the plastic measuring prism for flattening the vertex of cornea gives reflection-free observation of split images.