This patient was noted to have an asymptomatic vitreous cyst in the left eye.
Learning Points:
Vitreous cysts are extremely rare, idiopathic, and usually diagnosed as an incidental finding, as in this patient. If symptomatic, the cyst can literally be popped with a YAG laser.
These cysts likely originate from a ciliary body cyst (see Dhull et al, Ophthalmology Retina 2020;4:1208).

