4. Painless Vision Loss

Posterior Vitreous Detachment (PVD)

A posterior vitreous detachment (PVD) occurs when the vitreous body separates from the posterior portion of the normal retina, but the retina is still intact.

There is a higher prevalence of PVD in elderly and myopic patients. Patients with posterior vitreous detachment (PVD) often present with fluctuating cloudy vision, acute floaters, and brief flashes (photopsia).

Posterior Vitreous Detachment Ultrasound Findings

On ocular ultrasound, posterior vitreous detachment looks like a thin, hyperechoic membrane lifted off the posterior surface of the globe that is NOT tethered to the optic nerve. The membrane will freely move with ocular movements in an undulating fashion, like “swaying seaweed.”

Posterior Vitreous Detachment Illustration
Posterior Vitreous Detachment Ocular Ultrasound
Posterior Vitreous Detachment on Ultrasound

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