Samsung UN46ES7500FXZA E-Manual page 265

INFORMATION FOR 3D PICTURES.
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