Mosquito is mainly caused by vitreous clouding, can be divided into physiological vitreous clouding and pathologic vitreous clouding, if the patient does not have symptoms can be temporarily observed, if the visual obstruction is obvious, the patient can comply with the doctor’s instructions for medication, surgical treatment and other ways of treatment to improve the condition. 1. Temporary observation: physiological vitreous clouding is usually seen in the elderly, patients can appear in front of the black shadow fluttering, but usually does not affect the vision, patients can be temporarily observed, the emergence of symptoms and timely treatment. 2. Drug treatment: vitreous blood can lead to pathologic vitreous clouding, resulting in vision loss, patients can follow the doctor’s instructions to use lecithin complex iodine tablets, amiodarone peptide eye drops and other medications, to promote the absorption of cloudy vitreous, improve the discomfort symptoms. 3. Surgery: If the patient’s vitreous blood is not absorbed for a long time, or even retinal detachment occurs, the patient can be treated with surgery, such as vitrectomy. It is recommended that patients with obvious vitreous clouding should consult the hospital in time to assess their condition and follow the doctor’s instructions for treatment.