The 3Ds of Viewing 3D

• Discomfort:  Since 3D viewing is based on the eyes converging in front of or beyond the screen, viewing 3D images can potentially create eyestrain and headaches.
• Dizziness: 3D technology can exaggerate visual motion hypersensitivity (VMH), which can cause motion sickness, and vergence-accommodation conflict, causing individuals to feel dizzy or nauseous during or after viewing 3D content.
• Lack of Depth:  A viewer lacking binocular vision, comply won't see 3D.  While this doesn't pose any problem viewing the screen, it serves as an indicator that something is abnormal with the viewer's binocular vision.

Could you have a binocular vision problem?:

• Is the 3D viewing experience not as vivid as it is for others watching the same picture?
• Do you experience eyestrain or headaches during or after viewing?
• Do you feel nauseated or dizzy during or after viewing?
• Are you more comfortable viewing 2D TV or movies instead of 3D TV/movies?
• Is it difficult for your eyes to adjust back to normal after watching 3D TV/movies?

adapted from the American Optometric Association's "The 3D's of Viewing 3D"