Prevalence of Convergence Insufficiency-Type Symptomatology in Parkinson's Disease

TitlePrevalence of Convergence Insufficiency-Type Symptomatology in Parkinson's Disease
Publication TypeJournal Article
Year of Publication2017
AuthorsLaw, C., E. Chriqui, M. Kergoat, B. Leclerc, M. Panisset, E. Irving, R. Postuma, S. Chouinard, and H. Kergoat
JournalCanadian Journal of Neurological Sciences
Keywordsaged, antiparkinson agent, Article, binocular convergence, binocular vision, comparative study, complication, controlled study, convergence insufficiency, Convergence Insufficiency Symptom Survey Questionnaire, convergence insufficiency-type symptomatology, eye movement disorder, female, human, Humans, major clinical study, male, middle aged, Ocular Motility Disorders, Parkinson Disease, Parkinson's disease, Prevalence, priority journal, questionnaire, risk, Surveys and Questionnaires, symptomatology, Vision Disorders, visual disorder

{Background: Individuals with Parkinson's disease (PD) often present with visual symptoms (e.g., difficulty in reading, double vision) that can also be found in convergence insufficiency (CI). Our objective was to estimate the prevalence of CI-type visual symptomatology in individuals with PD, in comparison with controls. Methods: Participants ≥50 years with (n=300) and without (n=300) PD were recruited. They were administered the Convergence Insufficiency Symptom Survey (CISS-15) over the phone. A score of ≥21 on the CISS-15, considered positive for CI-type symptomatology, served as the cutoff. Data from individuals (n=87 with