Participants with (n=50) and without (n=100) a history of mTBI will be recruited. Investigators will study the use of a series of visual endurance tests (tests that require sustained visual responses over a period of time). In addition to developing expected values for these tests, investigators will also after qualitative data about discomfort levels during testing.
Age
18–35
Sex
ALL
Healthy volunteers
Accepted
You may be eligible if
Diagnosis of mTBI within previous 1 to 6 months
Distance visual acuity better than or equal to 20/25 in each eye
Score \>21 on Convergence Insufficiency Symptom Survey
You may not be if
Diagnosis of moderate or severe TBI; \> 30-min loss of consciousness
Not wearing required refractive error)
Disease(s) known to affect oculomotor system (multiple sclerosis, Graves orbitopathy, myasthenia gravis, diabetes mellitus, or Parkinson disease)-Manifest strabismus or intraocular injury (evaluated at vision examination)
