in parkinson's disease can be the disease process affecting the ocular muscles in the form of convergence inability.
It could be because of slow responsive reflexes for especially moving objects which can be perceived as double vision
or blurred vision
will not cause any ocular side effects which lead to diplopia.
Consult the ophthalmologist and also the treating physician who can take care of the condition.
These symptoms can lead to significant damage to the quality of vision as well as life.
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