Study Status: Completed
Recruit Status: Unknown status
Study Type: Observational
Official Title: The Head Injury-associated Photosensitivity and Pupillary Function (HIPP) Study
Brief Summary: After a head injury, many people find that exposure to light causes them increased discomfort. By measuring how the pupil in the eye constricts to flashes of red and blue light, this study will investigate whether this phenomenon is due to a change in the eye's sensitivity to light.