The MESA-EYE study is a separate add-on to the Multi-Ethnic Study of Atherosclerosis, a six regional center 10 year program begun in July 2000. The overall goals of the parent study are the identification of risk factors for subclinical cardiovascular disease, for progression of subclinical disease, and for transition of subclinical to clinical cardiovascular disease. The eye component will tie in with Exam 2 of the main study which begins August 2002 and runs through January 2004. Retinal photography to document microvascular changes will be performed on the approximately 6,500 MESA participants at Exam 2. Retinal photography will follow a standardized written protocol similar to that used in ARIC. Focal arterial narrowing and AV nicking will be classified as definite, questionable, or none. Data handling will be based on protocols previously used in several other NIH sponsored clinical trials where eye retinal studies were performed.