A new simulation model of intraocular pressure estimation by finger palpation.

Abstract

Measurement of intraocular pressure is necessary in a general eye examination. The standard method of intraocular pressure measurement is to use Goldman applanation tonometer. It works by flattening the surface of the cornea and then measuring the force required in millimeters of mercury. The limitation of this approach is that it is not applicable to patients with corneal surface problems or patients with eye injuries. Also, there are limitations such as lack of skill and equipment.

Therefore, in a certain situation it can be extremely useful if one can estimate the intraocular pressure by palpation with fingers. This method is simple, easy, less dangerous, and yet requires no equipment. The accuracy of pressure estimated by using fingers is however controversial. And the resolution of finger palpation is still unknown. To find the resolution of he palpation method, it is best and most ethical to simulate the experience in a mannequin as opposed to in patients. After the resolution is found, then the accuracy can be tested in vivo. We report a design of such instrument.