What Is Posterior Vitreous Detachment?
Posterior vitreous detachment (PVD) refers to the separation of the posterior vitreous cortex from the inner surface of the retina, which usually occurs on the basis of liquefaction of the vitreous. With the enlargement of the liquefaction cavity in the central part of the vitreous body, the posterior vitreous cortex becomes thinner and cracks appear. The liquefied vitreous enters the posterior vitreous space through the fissure, so that the posterior cortex and the retina are quickly separated. After separation, a ring-shaped turbidity (Weiss ring) appears in front of the retina. The ring can deform or sink over time.
Basic Information
- Visiting department
- Ophthalmology
- Common locations
- Vitreous
- Common causes
- Caused by separation of the posterior vitreous cortex from the inner surface of the retina
- Common symptoms
- Flashy, with floating objects in front of you
Causes of posterior vitreous detachment
- The posterior vitreous cortex is separated from the inner surface of the retina.
Clinical manifestations of posterior vitreous detachment
- Most patients have no acute symptoms when posterior vitreous dislocation occurs, and some people will have a flashing sensation with floating objects in front of their eyes. In the process of PVD formation, there are some tightly adhered parts that generate traction. As the eyeballs rotate, the floating vitreous cortex exerts a pulling force on the retina in the front-back direction or the tangential direction. Because the peripheral retina is thin and easily degenerates. Macularity is also prone to degeneration in highly myopic eyes, and this type of stretch can cause retinal holes or macular holes in the periphery. The liquefied vitreous body passes through the retinal fissure and enters the neurosensory layer, that is, retinal detachment occurs.
Posterior vitreous detachment test
- Routine ophthalmological examination, B-ultrasound and OCT examination confirmed the diagnosis.
Diagnosis of posterior vitreous detachment
- Can be diagnosed based on clinical.
Vitreous detachment treatment
- Patients with posterior vitreous detachment do not need special treatment, and lesions that are harmful to vision, such as retinal hiatus, should be treated according to relevant treatment principles.