Dr. CarlsonI have noticed that Parkinson’s patients are particularly challenging after cataract surgery and the following study helps shed light on my observation:

Convergence insufficiency significantly affects Parkinson’s patients’ quality of life

This prospective, case-control study assessed whether dopaminergic medication alone or in combinations with deep brain stimulation improved visual and ocular motor function inParkinson’s patients during the symptomatic “on state”. Additionally, it evaluated patients’ vision-related quality of life. Results showed Parkinson’s patients suffer from substantial convergence insufficiency compared to controls, which fluctuates throughout the day in association with the dosing schedule of medications, which complicates ophthalmic management and adversely affects vision-related quality of life. Ophthalmology, January, 2012