Parkinson’s disease can affect the visual system in a variety of ways, and its effects tend to be focused on one’s vision and eyelids. Impaired sight leads to a number of indirect effects, such as increased trouble walking or driving and even mild hallucinations. It’s important to understand how Parkinson’s disease can impair vision, as there are ways to mitigate its effects once the issues are correctly identified.

Parkinson’s Disease & Vision 

How Does it Affect Vision?

Because the disease causes a lack of muscle control, it can impact the muscles of the eyes, resulting in blurred or double vision. Doctors may overlook this symptom, as other symptoms of Parkinson’s, such as uneven gait, impaired balance, and cognitive issues, may not be linked with distorted vision. Individuals with Parkinson’s may also lose their sense of color. Dyskinesia, or abnormal movements of the body, may also affect the eyes and distort vision.

Effects on the Eyelids

Parkinson’s disease can also affect the eyelids. Effects can include excessive blinking, involuntary closure of the eyes, reduced blinking (causing dry eyes), or difficulty in opening the eyelids (called apraxia of lid opening, or ALO).

Side Effects of Medication

Common Parkinson’s medications may cause side effects that affect the eyes. Artane (trihexyphenidyl), which is used to treat tremors, can create dry eyes or blurry vision. Other Parkinson’s prescriptions can also cause mild hallucinations, especially if there are other vision problems.

Combating Related Vision Issues

Blurry and distorted vision can be corrected with glasses or special lenses. Work with an eye doctor who has experience with Parkinson’s disease. To treat dry eyes, try ointment, drops, or warm compresses. Apraxia can be assisted with special glasses or with tape that helps hold eyelids open. Even excessive blinking can be treated through injections of Botox (botulinum toxin) into eye muscles. If the side effects you experience feel too intense, talk to your doctor about modifying or switching your medication.

If you’re experiencing vision issues as a result of Parkinson’s disease, contact Connecticut Advocates for Parkinson's in Windsor, CT. They’re a 501 (c) (3) charity serving people and their families who are living with Parkinson’s. They offer resources, support, and information on clinical trials. Call (860) 266-6040 to learn about volunteering or assistance or visit their website to access helpful resources.