What Is Tonometry And How Is It Used To Diagnose Glaucoma?
Question: What is tonometry and how is it used to diagnose
glaucoma?  Answer: Tonometry refers to the technique of
measuring the intraocular pressure, or eye pressure. The usual
way or standard method that is typically employed is something
called Goldmann applanation tonometry. After putting in a
numbing drop, and in that usually it contains a fluorescent dye
called Fluorescein, and under a cobalt blue light, which is
commonly referred to as the blue light, a small probe will
contact with the surface of your eye and that contact will allow
measurement of the eye pressure. There are two other methods
which are sometimes used to measure pressure.  One is called a
tono pen, which looks like a large marker, but on the tip of it
is a very small applanation point or point in which of contact
with the eye that can measure the pressure as well or something
called pneumotonometry which involves contacting the eye with
something that resembles an air piston;