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Television 3D Technology? Perfect 3D Viewing May Take Years or Decades to Develop

Thu January 20 2011 4:58 am  http://www.arlingtoncardinal.com/?p=36309
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Optometrists estimate: As many as 30% of people have problems with 3D viewing.

3D technology has been the wave of the future for more than fifty years now. Yet despite decades of work, today’s 3-D technology offers, at best, an incomplete illusion, and at worst, makes people uncomfortable or even sick.

Samsung even issues a warning for their 3D LED TV …

3D Viewing Conditions
To watch in 3D mode, you need to put the 3D Active Glasses on and press the power button on top of the glasses. Fluorescent lighting may cause a flickering effect and direct sunlight may affect the operation of the 3D glasses. Turn off all fluorescent lighting and block sources of direct sunlight before watching in 3D mode.

Photosensitive Seizure Warning and Other Health Risks
Some viewers may experience an epileptic seizure or stroke when exposed to certain flashing images or lights contained in certain television pictures or video games. If you or any of your family has a history of epilepsy or stroke, please consult with a medical specialist before using the 3D function.

If you experience any of the following symptoms, immediately stop watching 3D pictures and consult a medical specialist: (1) altered vision; (2) lightheadedness; (3) dizziness; (4) involuntary movements such as eye or muscle twitching; (5) confusion; (6) nausea; (7) loss of awareness; (8) convulsions; (9) cramps; and/or (10) disorientation. Parents should monitor and ask their children about the above symptoms as children and teenagers may be more likely to experience these symptoms than adults.

Viewing in 3D mode may also cause motion sickness, perceptual after effects, disorientation, eye strain, and decreased postural stability. It is recommended that users take frequent breaks to lessen the likelihood of these effects. If you have any of the above symptoms, immediately discontinue use of this device and do not resume until the symptoms have subsided.

We do not recommend watching 3D if you are in bad physical condition, need sleep or have been drinking alcohol.

Watching TV while sitting too close to the screen for an extended period of time may damage your eyesight. The ideal viewing distance should be at least three times the height of the TV screen. It is recommended that the viewer’s eyes are level with the screen.

Watching TV while wearing 3D Active Glasses for an extended period of time may cause headaches or fatigue. If you experience a headache, fatigue or dizziness, stop watching TV and rest.

Do not use the 3D Active Glasses for any purpose other than viewing 3D television. Wearing the 3D Active Glasses for any other purpose (as general spectacles, sunglasses, protective goggles, etc.) may physically harm you or weaken your eyesight.

Viewing in 3D mode may cause disorientation for some viewers. DO NOT place your television near open stairwells, cables, balconies or other objects that may cause you to injure yourself.

SAMSUNG 3D TV NOTICE

Sony has a similar warning for 3D PlayStation devices …

3D DEVICE USE NOTICE
Some people may experience discomfort (such as eye strain, eye fatigue or nausea) while watching 3D video images or playing stereoscopic 3D games on 3D televisions. If you experience such discomfort, you should immediately discontinue use of your television until the discomfort subsides.

SCEA recommends that all viewers take regular breaks while watching 3D video or playing stereoscopic 3D games. The length and frequency of necessary breaks may vary from person to person. Please take breaks that are long enough to allow any feelings of discomfort to subside. If symptoms persist, consult a doctor.

The vision of young children (especially those under six years old) is still under development. SCEA recommends that you consult your doctor (such as a pediatrician or eye doctor) before allowing young children to watch 3D video images or play stereoscopic 3D games. Adults should supervise young children to ensure they follow the recommendations listed above.

Experts in the field of vision and 3D technology explain that during focusing, the eyes move inward to converge on close images and look straight ahead when focusing far away images. A 3D television image messes with the normal functioning of the eyes because the images are out of focus at the same distance. There are two main types of 3D viewers: Active and passive. An active view uses electronics to interact with the display — basically telling which eye to focus on a certain object on the display. Passive technologies involve filters related to restricting the light that reaches the eye. Each eye sees a different image, instead of trying to fuse the two images on the display. Other passive technologies also exist.

No Standard Yet
The entertainment industry is expected to adopt a common and compatible standard for 3D in home electronics. To present faster frame rate in high definition to avoid judder, enhancing 3-D film, televisions and broadcasting, other unresolved standards are the type of 3D glasses (passive or active), including bandwidth considerations, subtitles, recording format and a Blu-ray standard.

With improvements in digital technology, in the late 2000s, 3D movies have become more practical to produce and display, putting competitive pressure behind the creation of 3D television standards.

Unfortunately, the complications of how to view 3D technology and competing standards put the ideal 3D situation for consumers in limbo.

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