Posterior vitreous detachment, the more common clinical symptoms are mosquito, macular tear and so on. 1. Mosquitoes: The most common clinical symptom of posterior vitreous detachment is mosquitoes, which is manifested by the sensation of mosquitoes in front of the eyes, and some of them may be accompanied by astigmatism. With the aggravation of detachment, sometimes there may be complications, such as vision loss, or in a certain direction may appear fixed black shadow. 2. Macular lacunae: In the process of vitreous detachment, some of the tightly adhered parts may have certain tensile force, causing peripheral retinal lacunae or macular lacunae, resulting in decreased visual acuity, distortion of vision, dark shadows in the eyes, and other clinical manifestations. For only posterior vitreous detachment, no special treatment is usually needed. If abnormalities occur or vision is affected, it is recommended to consult a doctor in time and follow the doctor’s instructions for symptomatic intervention.