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Susan J. Leat, Lisa Li-Li Chan, Priya-Devi Maharaj, Patricia K. Hrynchak, Andrea Mittelstaedt, Carolyn M. Machan, Elizabeth L. Irving; Binocular Vision and Eye Movement Disorders in Older Adults. Invest. Ophthalmol. Vis. Sci. 2013;54(5):3798-3805. doi: 10.1167/iovs.12-11582.
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To determine the prevalence of binocular vision (BV) and eye movement disorders in a clinic population of older adults.
Retrospective clinic data were abstracted from files of 500 older patients seen at the University of Waterloo Optometry Clinic over a 1-year period. Stratified sampling gave equal numbers of patients in the 60 to 69, 70 to 79, and 80+ age groups. Data included age, general and ocular history and symptoms, use of antidepressants, a habit of smoking, refraction, visual acuity, BV and eye movement status for the most recent full oculo-visual assessment, and an assessment 10 years prior. The prevalence of any BV or eye movement abnormal test (AT) result, defined as a test result outside the normal range, was determined. This included strabismus (any) or phoria; incomitancy; poor pursuits; and remote near point of convergence (NPC). The prevalence of significant BV disorders (diagnostic entities, i.e., a clinical condition that may need treatment and may have functional implications) was also determined.
The prevalence of any BV or eye movement AT was 41%, 44%, and 51% in the 60 to 69, 70 to 79, and 80+ age groups, respectively. These figures were lower for 10 years earlier: 31%, 36%, and 40% for ages 50 to 59, 60 to 69, and 70+, respectively. The prevalence of any BV or eye movement disorder was 27%, 30%, and 38% for the three age groups and 17%, 19%, and 24% for 10 years prior. Age and use of antidepressants most commonly predicted BV or eye movement AT or disorder.
BV disorders are common among older adults.
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