Usually high myopia in 30s has mosquito is normal, mostly high myopia caused by physiological mosquito, but if it is pathologic mosquito is not normal. 1. physiological fiducial mosquitoes: physiological fiducial mosquitoes is caused by vitreous aging leading to vitreous clouding, highly myopic patients are more prone to vitreous clouding, and may have fiducial mosquitoes performance in their 30s. This kind of Aedes aegypti is mostly physiological normal phenomenon, usually does not affect the patient’s vision. 2. Pathological Aedes aegypti: Aedes aegypti in 30s with high myopia may also be abnormal, if the patient’s degree of myopia is more serious, it may cause lesions on the fundus of the eye, which may easily lead to retinal detachment, fundus hemorrhage and other complications. These lesions can also lead to the development of mosquitoes, and can also affect the patient’s vision, or even lead to blindness. It is recommended that patients with obvious symptoms of Aphthous Mosquito Disease seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.