Posterior Vitreous Detachment Flashcards
What is posterior vitreous detachment?
It is defined as a condition in which there is separation of the vitreous membrane from the retina
What is the vitreous body?
It is the clear gel-like substance that fills the inside of the eyeball
What are the two components of the vitreous body?
Collagen
Water
What are the two functions of the vitreous body?
To maintain the structure of the eyeball
To ensure the retina is pressed onto the choroid
What is the pathophysiological cause of posterior vitreous detachment?
There is decreased viscosity of the vitreous fluid and therefore the vitreous body is unable to maintain its shape
Therefore, the vitreous membrane pulls away from the retina, towards the centre of the eye
What three risk factors are associated with posterior vitreous detachment?
Older Age > 65 Years Old
Female Gender
Myopia
What are the four clincial features of posterior vitreous detachment?
Floaters
Flashing Lights
Blurred Vision
Reduced Visual Acuity
What investigation is used to diagnose posterior vitreous detachment?
Ophthalmoscopy
What is the feature of posterior vitreous detachment on opthalmoscopy?
Weiss Rings
What are Weiss rings?
They are defined as ring-shaped floaters around the optic nerve
What is the most appropriate next step in cases of suspected posterior vitreous detachment? Why?
Opthalmology review within 24 hours
This is to exclude a diagnosis of retinal tears/detachment
What is the management option of posterior vitreous detachment?
Conservative Management
What is the conservative management option of posterior vitreous detachment?
It involves advising individuals that it is a self-limiting condition which should resolve within 6 months
What are the two complications associated with posterior vitreous detachment?
Retinal Tear
Retinal Detachment
