Posterior vitreous detachment | Radiology Reference Article ...
2024年6月2日 · Posterior vitreous detachment (PVD), also known as hyaloid detachment, occurs when the retinal layer and vitreous body /posterior hyaloid membrane dissociate, with an …
Eye: Retinal, Choroidal, and Hyaloid Detachments
2017年5月14日 · Intraocular hemorrhage as seen on CT and MRI is usually due to retinal vascular abnormality or a traumatic episode. It can, however, be confused with other conditions and may be the result of significant underlying pathology such as an intraocular mass that might be obscured by the hemorrhage.
CT and MRI of the Eye - The Radiology Assistant
2008年9月19日 · There is a persistent hyaloid canal when the hyaloid artery does not integrate. On the images we see a persistent canal that goes from the optic nerve to the lens. There is also retinal detachment (occurs in 30-55%) and notice the microphtalmia. PHPV is the second most common cause of leukocoria. These patients also develop glaucoma and cataract.
Dynamic off-axis illumination slit-lamp biomicroscopy images demonstrating the clinical appearance of the posterior hyaloid membrane in a patient with posterior vitreous detachment. Note the classic creased and crinkled topographic appearance (AeI), in …
Posterior Vitreous Detachments - Optical Coherence Tomography Scans
Symptomatic PVDs are common add-on cases and utilizing the OCT can assist in the diagnosis of the stage of the PVD and appropriate follow up for the condition. When evaluating if a patient has had an PVD, look for the posterior hyaloid membrane and its attachment to the macula and optic nerve. Figure 1: Stage 2 posterior vitreous detachment.
Posterior Vitreous Detachment and the Posterior Hyaloid …
2017年4月26日 · Phase-contrast microscopy consistently identified a creased and distinct glassy membranous sheet enveloping the posterior vitreous surface, correlating closely with the posterior hyaloid membrane observed during slit-lamp biomicroscopy …
The Vitreous - Radiology Key
2016年3月5日 · Asteroid hyalosis is a clinical finding that displays a classic echographic appearance. Highly reflective signals that move separately from each other are noted within the vitreous cavity. Typically, vitreous opacities tend to disappear as the ultrasound gain is decreased.
Fellow-Eye Retinal Detachment Risk as Stratified by Hyaloid …
2022年11月7日 · Posterior hyaloid status—presence or absence of a posterior vitreous detachment (PVD)—in both eyes at the time of initial RRD was determined by OCT imaging. Baseline characteristics, including lattice degeneration, refractive error, prior ocular laser procedures, lens status, and family history of RRD, were recorded.
Posterior Vitreous Detachment - StatPearls - NCBI Bookshelf
2023年8月25日 · B-Scan Ultrasonography. Ultrasonography (US) has been used traditionally to find out the condition of the vitreous gel. It also helps to check the presence and extent of the posterior vitreous detachment. The principle of the B-scan US is that strong echoes are generated by acoustic interfaces present at the junctions of media.
Separation of Posterior Hyaloid with Retinal Pick
2020年4月7日 · In this video, Drs. Riley Sanders and Ahmed Sallam demonstrate induction of posterior vitreous detachment using a retinal pick or bent 25-gauge needle. This technique is performed during vitrectomy surgery in eyes with a firmly adherent hyaloid. Histologic and OCT analyses have shown the posterior hyaloid to be a multilayered, laminate structure.