<unk>  is a degenerative condition of the eye involving small white opacities in the vitreous humor. It is known to occur in humans, dogs, cats, horses, and chinchillas. Clinically, these opacities are quite refractile, giving the appearance of stars (or<unk> s) shining in the night sky—except that ocular<unk> s are often quite mobile. Ocular<unk> s must be distinguished from the more common typical vitreous floaters, which are usually fibrillar or cellular condensates. The cause of<unk>  is unknown, but it has been associated with diabetes mellitus, hypertension, hypercholesterolemia, and, in certain animals, tumors of the ciliary body. In dogs,<unk>  is considered to be an age related change. The<unk>  bodies are made up of hydroxylapatite, which in turn consists of calcium and phosphates or phospholipids. While<unk>  does not usually severely affect vision, the floating opacities can be quite annoying, and may interfere significantly with visualization and testing of the retina. While treatment of<unk>  is usually unnecessary, vitrectomy may occasionally be indicated, for both diagnostic and therapeutic purposes.
Asteroid hyalosis
Chorionic hematoma
Subdural hygroma
Cystic hygroma
Encephalocele
Arachnoid cyst
Choroidal fissure cyst
Porencephaly