What is Posterior Vitreous Detachment?
In normal conditions, the eye is filled with a gel called «vitreous humour» which is stuck to the retina.
The process by which this vitreous body becomes detached from the Retina is called Posterior Vitreous Detachment.
Posterior Vitreous Detachment is a very common process and can sometimes produce a retinal hole or tear which, if left untreated, can cause retinal detachment.
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The Retina is the light sensitive tissue which lines the inside of the eye. It collects images which are subsequently sent to the Brain through the Optic Nerve for processing. It is like a canvas onto which images are projected, like in cinemas.
If any person suffers damage to this tissue, it may seriously affect their vision in a permanent and irreversible manner. That is why it is very important to detect its existence in time in order to prevent this damage to the greatest possible extent.
Vitreous detachment cannot be prevented but if you do notice any «black spots» or «flashes of light», you should visit the ophthalmologist with a view to ruling out any connection with a retinal tear which may lead to detachment.
Symptoms of Posterior Vitreous Detachment
The most common symptoms are muscae volitantes or «floaters». These are small spots that many people see moving about in their field of vision, especially when they look at a lit background such as a white wall or a computer screen. It can also cause the individual to see flashes of light, also known as photopsia.
In the case of retinal detachment, the individual perceives a deformed vision and has the impression of seeing through water which precedes the vision of a black background which progressively occupies all or part of the field of vision.
Diagnosis and Treatment
In a case of Posterior Vitreous Detachment, first and foremost, an eye examination must be performed to rule out the complications indicated above.
Patients often become used to the «floaters» and only perceive them at isolated moments.
In cases where the retina is found to be torn, laser treatment is necessary to prevent detachment.
In exceptional cases, a surgical procedure is undertaken to remove the vitreous body (vitrectomy); or to dissolve the muscae volitantes by laser.
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