Visual function refers to the ability of the eyes and brain to work together to perceive and interpret visual information. This includes various aspects such as visual acuity, which is the clarity of vision, and color perception, which allows individuals to distinguish different colors. The process involves light entering the eye, being focused by the lens, and then being converted into electrical signals by the retina. Additionally, visual function encompasses depth perception, enabling individuals to judge distances, and visual field, which is the total area that can be seen when looking straight ahead. These components are essential for daily activities, such as reading, driving, and recognizing faces.