A large proportion of concussion patients with long-term consequences of concussion experience visually related symptoms such as headache, blurred vision, double vision, and fatigue. These patients often have difficulties coordinating the movement of the two eyes (convergence insufficiency) which is essential for single and clear vision to be obtained and is hence a likely explanation for the symptoms. 100 patients with long-term symptoms of concussion and convergence insufficiency will be offered either exercises or placebo treatment the evaluate the effect of exercises aimed at improving coordination between the two eyes. The study will provide data to support clinicians in deciding whether to use exercises or not as a treatment of symptoms for patients with convergence insufficiency as a long-term consequence of concussion.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
100
Vergence exercises as described by the Convergence Insufficiency Treatment Trials Group (CITT)
Generic management plan with non-visual elements
Danish College of Optometry and Vision Science
Randers, Central Region, Denmark, Denmark
RECRUITINGConvergence Insufficiency Symptom Survey (CISS) week 18
Questionnaire assessing the frequency of eye and visually related symptom during near work
Time frame: Duration (5 minutes) and performed at week 18
Convergence Insufficiency Symptom Survey (CISS) week 36
Questionnaire assessing the frequency of eye and visually related symptom during near work
Time frame: Duration (5 minutes) and performed at week 36
Near point of convergence - week 18
Psychophysical test of the eyes ability to converge
Time frame: Duration (2 minutes) and performed at week 18
Near point of convergence - week 36
Psychophysical test of the eyes ability to converge
Time frame: Duration (2 minutes) and performed at week 36
Positive fusional vergence at 40 cm - week 18
Psychophysical test of the slow fusional adaptation
Time frame: Duration (2 minutes) and performed at week 18
Positive fusional vergence at 40 cm - week 36
Psychophysical test of the slow fusional adaptation
Time frame: Duration (2 minutes) and performed at week 36
Vergence facility at 40 cm - week 18
Psychophysical test of fast fusional adaptation
Time frame: Duration (2 minutes) and performed at week 18
Vergence facility at 40 cm - week 36
Psychophysical test of fast fusional adaptation
Time frame: Duration (2 minutes) and performed at week 36
Rivermead post-concussional symptoms questionnaire (RPQ) - week 18
Questionnaire assessing the frequency of symptoms during activities of daily living
Time frame: Duration (5 minutes) and performed at week 18
Rivermead post-concussional symptoms questionnaire (RPQ) - week 36
Questionnaire assessing the frequency of symptoms during activities of daily living
Time frame: Duration (5 minutes) and performed at week 36
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