This study will examine whether a newly designed monitor for computers is better tolerated by concussed patients than the standard computer monitor. The information gathered from this study will contribute to the understanding of the persisting concussion symptoms including computer screen intolerance and photosensitivity, with the aim of helping those with concussions.

The study will involve completing a reading task on the standard computer monitor and the newly designed computer monitor. First, participants will be asked to rate their pre-test symptoms using a SCAT-III symptom checklist. Then they will read a short story and watch moving images on one of the devices (standard computer monitor or the newly designed computer monitor) for 30 minutes or until persisting concussion symptoms of moderate severity arise. Then, they will be asked to rate their post-test clinical symptoms using a SCAT-III symptom checklist. On a second visit, 7 to 10 days later, they will do the same activity on the other device. Each visit will take 60 minutes.

The study will involve 100 patients with a history of concussion and computer screen intolerance.

Inclusion Criteria:

• Diagnosis of persisting concussion symptoms (1 month to 5 year since concussion)
• Must speak English
• Must provide written consent
• No alcohol/recreational drug use within 24 hours of intervention
• No other neurological, psychiatric or ocular conditions

Exclusion Criteria:

• No diagnosis of Persisting Concussion Symptoms
• Under the age of 18, over the age of 65
• Other neurological/psychiatric or ocular conditions
• Alcohol or recreational drug use within 24 hours of intervention