There was a time when people correlated marijuana and the eyes only with dryness, redness and dilated pupils. Time (and some very pinpointed research) has indeed changed this perception for the better.
Glaucoma is a group of diseases that can damage the eye’s optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. The increased pressure, called intraocular pressure, can damage the optic nerve, which transmits images to the brain.