Before revision: Hallucinatory palinopsia (Greek: palin for "again" and opsia for "seeing") is a subtype of palinopsia, a visual disturbance defined as the persistent or recurrence of a visual image after the stimulus has been removed.
After revision: Hallucinatory palinopsia is a subtype of palinopsia, a visual disturbance defined as the persistent or recurrence of a visual image after the stimulus has been removed.