Glaucoma occurs when the eye pressure (intra-ocular pressure, or IOP) is too high. High IOP can damage the optic nerve which eventually can lead to loss of vision. Tumwater Eye Center has never used the “puff” method, and now has a no-drop method for testing IOP. Additionally, we utilize modern technology to evaluate changes from year to year. While prescription eye drops are the first line of treatment, our doctors only prescribe when the testing confirms you are at risk of vision loss.