IDOC is a network of independent optometrists that provides eye care services to patients across the United States. The company was founded in 1988 and is headquartered in Deerfield, Illinois. IDOC provides a range of services to its members, including group purchasing, marketing support, and practice management tools. The company has over 3,000 members and operates in all 50 states. IDOC has been recognized as one of the fastest-growing companies in the United States by Inc. Magazine.