Potential participants will be approached by the PI to ask if they are willing to participate in this study. If the subject agrees to participate, during their next scheduled clinic visit, the PI will also do a slit lamp examination including lens status using the AREDS 2008 Clinical Lens Opacity Grading Standards in addition to their standard of care clinic eye visit. The slit lamp examination including lens status using the AREDS 2008 Clinical Lens Opacity Grading Standards is the only research related activity in this clinic visit. Potential participants who are the "normals" for Study 2 will be recruited from one of the co-investigator's clinic who is their treating physician. If interested, their physician (co-investigator) will contact the research coordinator to meet or call the patient and explain the study. If he/she agrees to participate, the PI will do a slit lamp examination at their next scheduled visit in the same manner as the other Study 2 participants, except the central corneal thickness will also be determined by ultrasonic pachymetry (standard testing for patients with glaucoma but not normal controls). Data from these clinic visits will be used as baseline information for the study. The baseline clinical and demographic data to be collected in the study will be: 1. Date of Birth 2. Ethnicity 3. Gender 4. Ocular History (surgery, etc) 5. Type of Glaucoma 6. Current visual acuity 7. Refraction 8. Central corneal thickness 9. Intraocular Pressure 10. Slit lamp examination including lens status by methods above 11. Dilated examination including optic nerve appearance 12. Recent automated perimetry results (Humphrey visual field)