Aedes aegypti has more causes, physiological aedes aegypti is related to age, pathological aedes aegypti is mostly caused by vitreous hemorrhage, vitreous inflammation. 1.Physiological Aedes aegypti physiological Aedes aegypti is mostly caused by aging, highly myopic patients can also appear, because the vitreous liquefaction, turbidity, the patient thus appeared in front of the eyes of the black shadow fluttering symptoms, generally does not affect the patient’s vision. 2. Pathological Aedes aegypti (1) Vitreous hemorrhage: retinal tear caused by trauma or surgery, or retinal hemorrhage caused by retinal phlebitis, diabetic retinopathy, etc. When a small amount of blood infiltrates into the vitreous body, resulting in vitreous hemorrhage and clouding, the patient may show the symptom of floating black shadow in front of the eyes. (2) Vitreous inflammation: when the patient’s vitreous body has inflammation, it can lead to vitreous clouding, so the patient can have pathologic floaters, which can affect the patient’s vision in addition to the dark shadows in front of the eyes. (3) Other diseases: parasites, intraocular tumors, etc. can also lead to vitreous clouding, resulting in pathological Aedes mosquitoes. It is recommended that patients with obvious symptoms of Aedes aegypti should consult a doctor in time to evaluate their condition and follow the doctor’s instructions for treatment.