What is the most common cause of a posterior vitreous detachment (PVD)?

The most common cause of a posterior vitreous detachment (PVD) is age-related changes in the vitreous body. As people age, the vitreous gel that fills the eye undergoes a natural process of syneresis, in which it shrinks and becomes more liquid, causing it to pull away from the retina. This process is typically gradual and as the vitreous consistency changes, it can lead to a separation from the retinal surface.

Although other factors such as retinal detachments, trauma, and certain ocular conditions could lead to PVD, they are less common compared to the age-related changes that affect the vitreous structure. Thus, understanding the role of aging in the development of PVD highlights the importance of monitoring for symptoms as individuals get older, as they may be at greater risk for this condition.