The Head Injury-associated Photosensitivity and Pupillary Function (HIPP) Study

Completed

Conditions studied: Head Injury, Traumatic Brain Injury (TBI), Photosensitivity, Photophobia

In brief

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.

Key facts

Study ID

NCT01942564

Run by

Ohio State University

People needed

40

Starts

2013-08-01

Expected to finish

2015-12-01

Last updated by the study team

2017-09-25

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 18+ years old
• reports a previous head injury that occurred at least 6 months ago
• score of 2 or 3 (mild TBI) on OSU-TBI ID Survey
• best-corrected visual acuity of at least 20/30 in both eyes
• reliable visual field

You may not qualify if…

• pregnancy
• significant afferent pupillary defect
• previous history of neurodegenerative disease
• intraocular pressure more than 21 mm Hg
• significant visual field defect
• active corneal pathology
• history of retinal or optic nerve disease
• strabismus (eye turn)

Where it is running

• College of Optometry — Columbus, Ohio, United States

Full record on ClinicalTrials.gov

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