Visual abnormalities are a frequent symptom in people with Parkinson’s disease and include decreased visual function, visual hallucinations, abnormal eyelid movements, and abnormal eye movements. Visual disturbances that may be experienced by people with Parkinson’s disease are as follows: Difficulty with eye movements Some difficulty is experienced when moving the eyes or trying to move quickly, especially when gazing at fast-moving objects, for example, symptoms can be more pronounced. These can cause some daily activities to be affected, such as driving. Consult your doctor when these conditions occur, and certain Parkinson’s disease medications may help. Blurred vision Blurred vision can be caused by difficulty moving the eyes or as a side effect of Parkinson’s disease medications, especially taking anticholinergic drugs. Symptoms may improve over time or may occur during dose adjustments after taking the medication for a long period of time. If blurred vision persists or worsens, do not stop the medication and consult your doctor promptly. Double vision Double images are seen for a single object, which may be caused by difficulty moving the eye. Double vision is caused by the presence of poor muscle coordination and fatigue in Parkinson’s disease, which prevents the eye from moving in a uniform action. Also, there are some diseases not related to Parkinson’s disease that can cause double vision, such as thyroid disease, diabetes, or astigmatism. Dry eyes People with Parkinson’s disease may blink less often than others. The blinking action helps to clean the eyes and remove dust and dirt. If you don’t blink often enough, it can make your eyes dry or sore. There can be other causes of dry eyes, and sometimes the eye doctor may recommend trying artificial tears or help reduce discomfort and dryness. Involuntary eyelid closure Spasmodic contractions of the muscles around the eyelid responsible for the eyelid cause the eyelid to twitch, causing involuntary closure of the eyelid or even difficulty opening the eye, and sometimes the eyelid even closes completely. The etiology and treatment of blepharospasm is complex, and levodopa may contribute to this symptom. Generally if the condition is not severe, simple massage of the eyelids can improve the symptoms. Visual hallucinations Some people with Parkinson’s disease experience visual hallucinations. Patients see things that are not there, such as flashing lights, objects, people or animals, usually in the middle to late stages. They are usually caused by the disease itself and by side effects of medications. Some older adults with cognitive problems are more likely to have this problem.