Figure 4.

Vitreous pigment is commonly seen in C57BL/6N mice. Vitreous pigmentation located axially and often in association with the pole of the posterior lens capsule or optic nerve head (A–C; white arrows) is characteristic of persistent hyaloid vasculature or persistent hyperplastic primary vitreous. Also commonly found are punctate dispersed pigment flecks located throughout the vitreous chamber (D; black arrows). Additionally, (D) shows an example of an isolated blood vessel, representative of persistent hyaloid vasculature (asterisk).