People with Parkinson’s disease often complain of dry eyes, vision loss, difficulty reading, and other vision-related symptoms. In fact, Parkinson’s disease itself and the side effects of treatments such as anti-Parkinson’s drugs can cause abnormalities in vision. The tissues and organs associated with vision include the eyelids, eyeballs, eye muscles, optic nerves, visual conduction pathways and the visual cortex. Known vision-related disorders that may occur in patients with Parkinson’s disease include: 1. Visual hallucinations: usually occur in the late stages of the disease and are accompanied by psychiatric symptoms, usually caused by medications. 2. Decreased visual function: significant reduction in color discrimination, contrast sensitivity, and spatial discrimination; 3. Abnormal eye movements: sweeping and following disorders, abnormal eye movements, microtremors, and disturbances in fast-wave sleep (rapid eye movements); 4. Abnormal eyelid movements: reduced spontaneous transients, spontaneous and reflexive blepharospasm, and eyelid dysfunction; In addition, patients with Parkinson’s disease often have a dull, expressionless face with reduced eye rotation. expressionless, with reduced eye rotation and fewer transients, mainly because the muscles responsible for eye movements are decreasing in function, making fewer movements including blinking, which happens to moisten the surface of the eye with tears, keep the cornea shiny, and remove dust and bacteria from the eye, so Parkinson’s patients are prone to dry eyes and eye inflammation in the early stages. These symptoms can be improved by medication adjustment to improve the problem of facial muscle stiffness. For patients with long duration of disease and ineffective medication control, it is recommended that they should receive deep brain electrical stimulation surgery as soon as possible.