Samsung LT27A750ND-ZA - Manual (Page 163)

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Precautions when viewing 3D video
– The 3D effect may be experienced differently depending on the viewer. You may
not notice the 3D effect at all if you have a prescription for one eye that is very
different from the other eye.
– When viewing a 3D video under a fluorescent lamp or 3-wavelength lamp, you
may notice a small amount of screen flickering.
– Interference may cause the 3D glasses to malfunction if there is any other
3D product or electromagnetic device (a microwave or a device that uses
2.4 Ghz-bandwidth frequency such as an Internet router) turned on nearby.
Even if the 3D function not works properly, it is best to remove other nearby
electromagnetic devices or wireless communications devices.