For many clinical conditions or forms of eye disease, early detection promises access to the most effective means of treatment. With help from Dr. Jeffrey Goldberg and other colleagues at Stanford’s Department of Ophthalmology, this study aims to develop a screening test for detecting early stage sof glaucoma. EEG brain-wave comparisons between clinical participants and those without eye disease will illuminate patterns in visual processing connected to developing stages of glaucoma. Participants with normal or corrected vision are needed to test different versions of the screening test.