If you are experiencing eyestrain or headaches, it could be due to excessive depth amount or improper convergence setting.  Unfortunately, most full feature films such as 3D BluRay discs do not allow for depth adjustment.  However, PC based media playback and 3D Video games most always have an adjustment for the amount of depth (separation) and convergence (focal point of the in-to and out-of screen balance of the scene).

We recommend to first attempt to adjust the depth:

• In-game adjustment, use the shortcut keys to decrease the depth amount.
• If you are new to gaming, start at the default 15%.

We recommend to adjust the convergence if depth adjustment does not help:

• In-Game Adjustment, use the shortcut keys to adjust the convergence point and push objects further away and into the screen.
• Try various convergence points by adjusting the scene in-to or out-of the screen using the hot keys until a comfortable range is found.

Lastly, always consider that virtual stereoscopic viewing places additional fatigue on the muscles that control eye movements.  This fatigue will go away with time and is a matter of physical conditioning of your eye muscles.  People with faster visual tracking may be able to experience greated depth settings with more comfort than people with slower visual tracking.  A good example would be to compare the eyes of a two different professionals: the eyes of a NASCAR driver compared to the eyes a receptionist.  Generally speaking, the NASCAR driver will have more exercised and more conditioned eye muscles allowing them to track the motion of objects faster than the receptionist.  The NASCAR driver will most likely in all cases have a more pleasant experience than the receptionist when looking at virtual stereoscopic images for the first time.

Warning: If eyestrain and headaches persist, discontinue viewing in stereoscopic 3D mode and consult a physician.  Certain physical vision conditions or impairments may cause discomfort when viewing stereoscopic images on a 3D viewing device.  Certain physical health conditions may cause shutter-type 3D glasses to be more un-comfortable than polarized-type 3D glasses. 

Suggested Viewing Distances for Various Sizes of Screens

• For 22-30 inches diagonal  suggested viewing distance of 18-24 inches
• For 57-73 inches diagonal  suggested viewing distance of 6-15 feet
• For 80-120 inches diagonal  suggested viewing distance of 8-25 feet
• For 30-50 feet diagonal  suggested viewing distance of 40-200 feet

Newer graphics cards have a HDMI port instead of a DVI port. In this case, simply use a HDMI cable to connect the PC directly to the TV.  Make sure to consult your TV's manual to check if a specific HDMI input must be used for 'PC' mode.

For older graphics cards, the DVI output from the PC's graphics card must be connected to the TV's 3-D compatible HDMI port using a DVI-to-HDMI cable (or a HDMI cable plus a DVI to HDMI adaptor).  Be careful to make sure that you use the correct input.  Some older Samsung and Mitsubishi 3D DLP HDTV products may require you to use HDMI input 3 or the HDMI input also labelled as PC input on the back of the 3D DLP HDTV.  Some 3D ready projectors may only support 3D on the analog VGA port, for these products you will need a DVI to VGA adaptor for your graphics card. 

Once properly connect make sure that you have activated a 3D output format within the chosen software on your PC to output in a 3D format that is acceptable by your 3D HDTV. For example, some products may require 3D DLP Checkerboard, 3D 120 Hz frame-sequential, 3D side-by-side at 60Hz or others.

This issue could be caused by a few things, so its important to describe the different ways to connect your GPU to your DLP.

Using the HDMI connector on the GPU to plug directly into the DLP HDMI input

For this configuration, check to make sure that you have connected the S/PDIF connector from the motherboard to the GPU. Please check with your motherboard manufacturer to ensure it has the correct S/PDIF connector.

If your motherboard does not have a S/PDIF connector and you wish to use the analog output on your motherboard to connect to the DLP, follow the instructions in Using the DVI connector on the GPU to plug directly into the DLP below.

Using the DVI connector on the GPU to plug directly into the DLP using a DVI to HDMI adapter

3D Vision ships with a DVI to HDMI connector that can be used to connect to the HDMI input on the DLP. In order to connect analog audio from your PC to the analog input on the television to use the television's speakers, follow these instructions:

1.   Download the 3D Vision DLP Hotfix.

· Windows Vista 32-bit DLP Hotfix

· Windows Vista 64-bit DLP Hotfix

2.   Connect your PC's analog audio into the analog input on the back of your DLP. Mode DLPs use left and right RCA audio inputs so you will likely need a cable called "3.5mm Stereo Headphone To RCA Adapter Cable" to connect your PC to the DLP.

3.   Run the 3D Vision DLP Hotfix. Make sure you are running this as an Administrator on your PC

4.   Follow the onscreen instructions to disable HDMI audio. Note that this DLP Hotfix will also toggle the HDTV Resize Desktop compatibility mode. For more information on that mode, please read this Knowledge Base article.  

5.   Reboot your PC.

6.   If your DLP requires any changes to its settings, use your DLP remote to configure the audio input.

7.   Start up your media player and adjust the volume to a comfortable level.

Yes, the X102 glasses work with the 120 Hz 3D DLP projectors such as the Optoma HD66.  Concerning DirectTV connectivity, we have not yet recieved an answer from the cable companies regarding support for 120 Hz HDMI 1.3a 3D DLP projectors.  Please note that the complication is due to the 3D DLP Projector requiring a 120 Hz page-flipped (frame sequential) 3D input signal and not a checkerboard signal such as the Samsung or Mitsubishi 3D DLP HDTVs.  This is the case with most all consumer grade 3D DLP Projectors.