Samsung PL64E8000GFXZP - Manual (Page 250)

Read and understand the following safety
information before using the TV’s 3D function.
[
Warning
ΠSome viewers may experience
discomfort while viewing 3D TV such
as dizziness, nausea and headaches.
If you experience any such symptom,
stop viewing 3D TV, remove the 3D
Active Glasses and rest.
ΠWatching 3D images for an extended
period of time may cause eye strain.