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.
Definition of fantasy for English Language Learners. : 1  something that is produced by the imagination : an idea about doing something that is far removed from normal reality. : 2  the act of imagining something. : 3  a book, movie, etc., that tells a story about things that happen in an imaginary world.