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The reason he gives for 2D monitors being bad for your eyes is spot on. However, it seems to me that these would actually be better because they would make you

by thefool 16y ago

The reason he gives for 2D monitors being bad for your eyes is spot on. However, it seems to me that these would actually be better because they would make your eyes change thier depth of focus more. Looking at sterograms can actually improve your vision by strengthening eye muscles that aren't frequently used in our computer - don't go outside and change focus much - age.

wallflower 16y ago
My optometrist told me the following rule: 20-20-20 At least every 20 minutes look away from the monitor at something (the ceiling in the far corner, ideally out a window) at least 20 feet away for 20 seconds. I have a pair of computer prescription glasses. They seem to have helped me vision from declining more.
teilo 16y ago
When viewing 3D video, depth of focus does not change. That's the issue. 3D breaks the association between focal distance and convergence. It forces a constant focal distance while the convergence point varies. It's not normal for eyes to work this way, and it does cause disorientation, mild in some, stronger in others. Whether this is a serious issue or not, time will tell.
- lutorm 16y ago
  Thank you for actually spelling out what exactly they were complaining about, and I can see how this would be an issue when viewing a monitor. However, you don't have to go to very large distance until the focal distance is effectively infinite. So I guess the moral of the story then is to combine the 3D technology with a projection system that puts the image at close to infinity (like http://www.mikesflightdeck.com/Scenery_display_2.htm http://www.mikesflightdeck.com/Scenery_display_2.htm). I've played around with this lens approach for flight simulators, and I have to say that having the image near optical infinity makes a much larger impression than you might think. You are actually looking through the screen, not at it. The quality isn't great, but it greatly adds to the feeling of immersion. I think this is more important than 3D, since stereoscopic vision really only works at quite short distances.
  - thefool 16y ago
    Indeed, the other solution is true holograms, that people have been playing with for years. Those actually physically have the light reflect to your eye from different positions in the "z" direction. They seem to have a number of techical problems though that would prevent them from being ubiquitous.

by thefool 16y ago

wallflower 16y ago

My optometrist told me the following rule: 20-20-20 At least every 20 minutes look away from the monitor at something (the ceiling in the far corner, ideally out a window) at least 20 feet away for 20 seconds. I have a pair of computer prescription glasses. They seem to have helped me vision from declining more.

teilo 16y ago

When viewing 3D video, depth of focus does not change. That's the issue. 3D breaks the association between focal distance and convergence. It forces a constant focal distance while the convergence point varies. It's not normal for eyes to work this way, and it does cause disorientation, mild in some, stronger in others. Whether this is a serious issue or not, time will tell.

lutorm 16y ago
Thank you for actually spelling out what exactly they were complaining about, and I can see how this would be an issue when viewing a monitor. However, you don't have to go to very large distance until the focal distance is effectively infinite. So I guess the moral of the story then is to combine the 3D technology with a projection system that puts the image at close to infinity (like http://www.mikesflightdeck.com/Scenery_display_2.htm http://www.mikesflightdeck.com/Scenery_display_2.htm). I've played around with this lens approach for flight simulators, and I have to say that having the image near optical infinity makes a much larger impression than you might think. You are actually looking through the screen, not at it. The quality isn't great, but it greatly adds to the feeling of immersion. I think this is more important than 3D, since stereoscopic vision really only works at quite short distances.
- thefool 16y ago
  Indeed, the other solution is true holograms, that people have been playing with for years. Those actually physically have the light reflect to your eye from different positions in the "z" direction. They seem to have a number of techical problems though that would prevent them from being ubiquitous.