Generally speaking, when patients have physiological mosquito flying syndrome, the main clinical symptom is a small floating black shadow in front of the eyes, especially when patients look at the white bright background, this black shadow will be more obvious, and some patients will also be accompanied by a sense of flash. Flying mosquitoes is a common and frequent disease in the ophthalmology clinic, in general, patients appear physiological flying mosquitoes, the main reason is the vitreous liquefaction or posterior vitreous detachment caused. When the patient appears mosquito flying disease, the main symptom is a floating black shadow in front of the eyes, usually the shape of the black shadow is not fixed. And patients with mosquito flying disease, vision is not significantly affected. In the clinical when the patient appears mosquito flying, and through the examination is physiological mosquito flying, generally speaking, it is recommended that patients can use topical amiodarone drops eye spot, or oral lecithin complex iodine to improve the symptoms.