A constant feeling of black spots or floating objects in front of the eyes is most often seen in vitreous or fundus diseases. Once the above situation occurs, it is recommended that an early fundus examination is needed, which is generally seen in two cases. First, physiological vitreous clouding and mosquitoes, this situation will not cause significant impact on vision, and does not require special treatment. If the individual feels that the impact on vision is obvious, you can consider oral lecithin complex iodine tablets or laser ablation to improve the symptoms. Second, pathological changes, such as vitreous hemorrhage, porous retinal detachment, diabetic retinopathy, retinal vein obstruction, uveitis and other diseases, which require symptomatic treatment for the specific cause.