NEC P452H User Manual page 76

[L/R INVERT]
Change the setting if you have difficulty seeing 3D images.
NON-INVERT ��������� Normal setting�
INVERT ������������������ Changes the order of displaying the images for left eye and right eye�
NOTE:
• When [L/R INVERT] cannot be operated, the [L/R INVERT] screen will not be displayed even when the remote control's video
button is pressed.
65
4. Using On-Screen Menu