What is a predisposing factor for posterior vitreous detachment?

Posterior vitreous detachment (PVD) occurs when the vitreous gel that fills the eye's interior separates from the retina. Myopia, or nearsightedness, is considered a predisposing factor for PVD because individuals with myopia tend to have elongated eyeballs. This elongation can result in an increased risk for vitreous detachment as the structure of the eye undergoes changes with age.

In contrast, while conditions such as hypertension and diabetes can have significant effects on the vascular health of the eye and may contribute to other ocular complications, they are not direct predisposing factors for PVD itself. Age is also a significant risk factor for PVD, as it typically occurs as individuals get older; however, myopia is specifically linked to the anatomical changes in the eye that predispose someone to experience PVD earlier. Thus, myopia stands out as a significant risk factor for PVD in this context.