What is "muscae volitantes"

Musca \Mus"ca\, prop. n.; pl. Musc[ae]. [L., a fly.]

1. (Zo["o]l.) A genus of dipterous insects, including the common house fly, and numerous allied species.

   Note: Formerly, a large part of the Diptera were included under the genus Musca.

2. (Astron.) A small constellation situated between the Southern Cross and the Pole.

   Musc[ae] volitantes. [L., flying flies.] (Med.) Specks or filaments apparently seen moving or gliding about in the field of vision. Their appearance is often a symptom of disease of the eye, or of disorder of the nervous system.

n. floaters (qualifier: threadlike specks in the visual field)

n. spots before the eyes caused by opaque cell fragments in the vitreous humor and lens [syn: musca volitans, floater, spots]