The tissue damage in individual hypersensitivity reactions is often caused by a mixture of the types of hypersensitivity reaction, for example, a combination of types I and IVa. IVb and IVc in contact hypersensitivity.
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).
Occipital Lobe - Region in the back of the brain which processes visual information. Not only is the occipital lobe mainly responsible for visual reception, it also contains association areas that help in the visual recognition of shapes and colors. Damage to this lobe can cause visual deficits.