Vision-related terms include OPTIC, OCULAR, and OAIC. OPTIC is a five letter term that refers to the eye or vision in general. OCULAR is a six letter term that is related to the eye and vision, such as OCULAR muscles or OCULAR diseases. OAIC is a four letter acronym for the Office of the Assistant Secretary for Aging and Independent Living, which is part of the U.S. Department of Health and Human Services and focuses on vision-related issues.