To understand how glaucoma develops, we must first understand how fluid circulates within the eye. Fluid is produced inside of the eye, by a structure known as the ciliary body. The structure is located just beneath the iris. The fluid then travels through the pupil, and exits via the eye’s drainage system, called the Trabecular meshwork.
In healthy eyes, there is a normal balance between the fluid that is made in the eye, and the fluid that leaves the eye. Therefore, this fluid creates a relatively constant and healthy pressure within the eye. This pressure is needed to keep the eye inflated, nourished, and functioning properly. This is what we mean by the “eye pressure,” and your eye doctor measures it routinely.