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Several studies have found a broad range of incidence of PVD, from 20% of autopsy cases to 57% in a more elderly population of patients (average age was 83.4 years). [4] People with myopia (nearsightedness) greater than 6 diopters are at higher risk of PVD at all ages. Posterior vitreous detachment does not directly threaten vision.
If these liquid pockets are close enough to the interface between the vitreous gel and the retina, they can cause complete separation of the vitreous from the retina in a normally occurring process in older humans called posterior vitreous detachment (PVD). PVD in of itself is not dangerous and a natural process. [citation needed]
Additionally, the PVRI co-sponsors and supports a number of regional and worldwide events with the aim of advancing research and activities in the PVD field. Members of the PVRI have access to an online library of clinical management guidelines, educational materials, advice, and information about current research initiatives and clinical trials.
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Physical vapor deposition (PVD), sometimes called physical vapor transport (PVT), describes a variety of vacuum deposition methods which can be used to produce thin films and coatings on substrates including metals, ceramics, glass, and polymers. PVD is characterized by a process in which the material transitions from a condensed phase to a ...
Fundus of geographic atrophy. Geographic atrophy (GA), also known as atrophic age-related macular degeneration (AMD) or advanced dry AMD, is an advanced form of age-related macular degeneration that can result in the progressive and irreversible loss of retinal tissue (photoreceptors, retinal pigment epithelium, choriocapillaris) which can lead to a loss of central vision over time.
If an identifiable disease does not cause this, it is called a primary vascular dysregulation (PVD); in case of an underlying disease, it is called secondary PVD. PVD is almost always associated with other vascular and non-vascular symptoms and signs. [19] This entire complex (PVD and accompanying symptoms) is today called Flammer syndrome. [20]
Adjunctive treatment of intermittent claudication due to peripheral vascular disease (PVD) of the lower limbs (stage 2) Adjunctive treatment of anhedonia, apathy and treatment-resistant depression in unipolar and bipolar depressives ; Treatment of gait disorders associated with Parkinson's disease (no related cause) and other forms of parkinsonism