The National Eye Institute (NEI) is a part of the National Institutes of Health (NIH) in the United States. Established in 1968, its primary mission is to conduct and support research on eye diseases and vision disorders. The NEI aims to improve the prevention, diagnosis, and treatment of conditions that affect vision. In addition to research, the NEI provides information and resources to the public about eye health. It promotes awareness of eye diseases such as glaucoma, cataracts, and age-related macular degeneration. The institute also supports training for scientists and healthcare professionals in the field of vision research.