What Is Pigment Dispersion Syndrome?
Pigment is the material that gives your iris its color. Pigment dispersion syndrome (PDS) happens when the pigment rubs off the back of your iris. This pigment then floats around to other parts of the eye. The tiny bits of pigment can clog your eye's drainage angle. This can cause eye pressure problems.
Your eye maintains a healthy eye pressure by constantly making a fluid called aqueous humor. As new aqueous flows into your eye, the same amount should flow out. If enough fluid doesn't leave the eye, pressure inside the eye (intraocular pressure, or IOP) builds up over time and damages the optic nerve. This is called glaucoma. When PDS has progressed to this stage, it is called pigmentary glaucoma. Not everyone who has pigment dispersion syndrome will develop pigmentary glaucoma.