Regional Veterinary Surgery

VITREOUS

• About 3/4^th of the volume of the eye is occupied by a gelatinous structure called vitreous, which also gives, its shape to the eye.
• 98% of the vitreous is water and the rest 2% consists of collagen fibrils, Hyalocyte, and mucopolysacharides and Persistent Hyaloid Artery
• On the posterior lens capsule a small attachment persists – sometimes seen along with posterior capsular cataract.
• In ruminants, a remnant persists from the center of the optic disc.
• Persistent Hyper plastic primary vitreous
• When the vascular supply to the embryonic lens remains in the adult vitreous, the condition is called persistent hyper plastic primary vitreous.
• Some times seen as associated with cataract and retinal detachment.
• Vitreous haemorrhage
• This condition could arise as a sequela to thromtocytopenia, trauma, neoplasia and to infectious diseases.
• Treatment consists of systemic use of corticosteroid.

Liquified vitreous (Synchysis scintillans)

• It is usually seen in aged patients or as a sequela to inflammation.
• When the head is moved the freely floating bodies tends to move and settle.
• This condition may predispose to retinal detachment.
• When the suspended particles consists of calcium lipid complex, the condition is called Asteroid Hyalosis.