|Common vitreous cases
(click on the cases or conditions for cases and description)
|Vitreous pathology rarely presents
as the main case in the examination, more commonly the pathology is either
an incidental finding or an associated feature. Common signs in vitreous are: asteroid hyalosis, posterior vitreous
detachment, cells in the vitreous and red blood cells. Only two conditions are described here: asteroid hyalosis
and posterior vitreous detachment.
The most common reason for failing to spot physical sign(s)
in the vitreous is incomplete examination.
eagerness to look for physical signs in the anterior segment
therefore forget to examine the vitreous (vitreous pathology is especially important in macular hole
in which you need to look for operculum and also in vasculitis/chorioretinal scar for vitreous cells).
Rotate the slit to 45 degrees and tilt it up at the minimum angle of separation from the viewing pathway.
|Return to the main page|
The vitreous contains white or yellow refractile deposits dispersed through out the vitreous. The deposits are
immobile despite movement of the eyes (because they are made up of calcium salts firmly attached to the vitreous
fibrils). The retina view is obscured.
1. What are the differences between asteroid hyalosis and synchysis scintillans?
Posterior vitreous detachment
Posterior vitreous detachment is a common sign in the examination especially in the elderly. The examiner usually
does not expect you to comment on it. However, there are certain conditions in which you are expected to look for
that macular hole is unlikely to develop.
external procedure and its absence usually suggests vitreoretinal surgery.