<qa>  What is the name of the database that will be collected from three sources?Data will be collected from three sources. We will use the VISTA database to determine resource use, patients demographics, co-morbidities and medications. Trained medical personnel will conduct chart reviews on a random sample of patients undergoing photocoagulation to determine whether it was sub-optimally timed i.e., the patient already had a major retinal hemorrhage or advanced macular edema at the time of the procedure. A random sample of patients will be surveyed, at baseline and after 12 months, about non-VA eye care services they received and their attitudes and satisfaction toward eye care. We will also survey health care providers regarding diabetic eye care services. 