Certified Ophthalmic Medical Technologist (COMT)

Answer: C -  Intraocular pressure is related logarithmically to the gauge reading on the Schiotz tonometer.

The higher IOPs are clustered at the bottom of the scale, making the relationship essentially logarithmic. The higher the IOP, the lower the gauge reading on the Schiotz. The IOP cannot be read directly from the gauge. Instead, weights are added to provide a more accurate measurement.