Vitreous clouding in both eyes can be a physiological phenomenon, or it can be caused by pathologic reasons. If pathologic vitreous clouding is not treated in time, it may lead to serious consequences such as loss of vision or even blindness in both eyes. Physiologic vitreous clouding generally does not require treatment and will not lead to serious consequences. Vitreous clouding secondary to diabetic retinopathy, fundus hemorrhage or retinal detachment and other fundus diseases usually occurs suddenly and develops rapidly. If vitrectomy or other treatments are not carried out in a timely manner, the further development of the disease will eventually lead to severe vision loss or even blindness in both eyes. When there is a sudden onset of vitreous clouding and severe vision loss, it is necessary to go to the ophthalmology clinic in a timely manner for ultrasound or fundus photography and other examinations to clarify the condition, and then choose surgery or conservative treatment under the advice of the doctor, so as to avoid adverse effects on vision.