White dots in the eyes when looking at the sky, this is usually a sign of mosquito flying. This condition is also called physiological vitreous clouding, in high myopia and middle-aged and elderly people are more common. The cause of this condition is mainly due to vitreous liquefaction. Under normal circumstances, the vitreous should be a jelly-like substance with a uniform and consistent structure, so there will be no fly-away or floating objects in front of the eyes. With the deepening of myopia or ageing, the vitreous also began to appear degenerative lesions, will be manifested as the vitreous liquefaction, which will lead to the structure of the vitreous becomes inconsistent, so there will be a mosquito or floaters in front of the eyes. This symptom is a physiological phenomenon, so it does not affect the vision and does not need to be treated. Only if the symptoms are obvious and affect the normal life, then medication or surgery should be considered to improve the symptoms.