There are two possibilities for seeing a black spot in the eye: one, the black spot does not move with the rotation of the eye, and is mostly seen in corneal foreign bodies, central plagiochoroidal retinopathy, or retinal detachment. Corneal foreign bodies need to be removed promptly, while different treatment measures are taken depending on the degree of corneal damage. Patients with mesoplasia have a plasmacytic detachment of the neuroepithelial layer in the macula, leaving a black spot in the center of the visual field. Mesoplasia is self-limiting but may recur and requires laser treatment or photodynamic therapy if necessary. In case of limited retinal detachment, there will be a black shadow obscuring the vision. The retina will be reset mainly through vitrectomy, or extra-scleral pressure surgery. Second, the black spot will move with the movement of the eye, clinically diagnosed as vitreous turbidity, that is, flying mosquitoes, high myopia or elderly people are common, vitreous aging, liquefaction, become cloudy, so that the flocculent floating in front of the eyes, generally does not affect vision. If it affects daily life, you can do vitreous laser ablation to promote the absorption of cloudy material.