When a posterior vitreous detachment occurs, the patient may notice floating objects in front of the eyes, such as dots, flies, rings, etc. This is caused by a concentrated gel floating into the visual field. If the detached vitreous forms a traction on the retina, the patient may experience a “lightning” vision. The traction causes the blood vessels to rupture, resulting in the accumulation of blood in the vitreous, and the patient may experience “red smoke”. When excessive traction causes retinal fissures and retinal detachment, vision is obscured. Incomplete posterior vitreous detachment can lead to the formation of age-specific macular fissures; defects in the inner retinal boundary membrane can stimulate the production of a macular anterior membrane. Patients should visit professional ophthalmology in time for detailed fundus examination, eye ultrasound follow up and OCT examination if necessary to understand the macular condition to get early diagnosis and treatment.