Depending on its location and severity, a TBI can affect your vision by damaging parts of the brain involved in visual processing and/or perception (e.g., cranial nerves, optic nerve tract or other circuitry involved in vision, occipital lobe).
Imagination, also called the faculty of imagining, is the ability to form new images and sensations in the mind that are not perceived through senses such as sight, hearing, or other senses.
Noun. 1. imagery-the ability to form mental images of things or events; he could still hear her in his imagination. imaging, mental imagery, imagination. representational process-any basic cognitive process in which some entity comes to stand for or represent something else.