With Passive lenses, I'm fine for extended wear (I sat through a double feature of Toy Story in 3D using passive lenses). With Active Lenses however, I encounter the same symptoms I get when watching CRT monitors for extended periods, though with a much faster onset:
- Immediately upon the active glasses activating (usually when they've been synced to the monitor for programming material), the back of my eyes itch slightly.
- Five minutes in, and my brain feels fuzzy, while my eyes physically hurt (level 1/10 - annoyance, yet noticeable)
- Ten minutes in, I have a headache that's a 3/10 on the pain scale (enough to pop pills, if only because I know it'll get worse if I don't do so soon.) My eyes also hurt physically (4/10), and I find myself rubbing them on a regular basis to try and alleviate symptoms.
- ~13 minutes in, and nausea has set in. Headache is now a 4.5/10, while my eyes literally refuse to focus on the display (pain is 5/10). I promptly removed the glasses and had to rest for a few moments until symptoms dissipated.
Environment was a well-lit Best Buy, the program material was bright and colorful in nature, and the display center was eye-level with the glasses. Viewing position was 0 degrees center. The longest test was done on a Samsung (1st gen), though symptoms present themselves in the same fashion and times with newer displays from Samsung, Panasonic, Sony, etc. It's a shame, because LG's passive lenses look great, but the loss of vertical resolution at large screen sizes is a deal-breaker for me (on the 3DS' smaller screens, it's a non-issue). If LG unveils a sub-$5k panel that does full resolution 1080p in 3D using passive glasses, I'll be a Day One adopter, credit card be damned. I know they claim I can see the entire detail based on how the eye works, but I still see scan lines on their 3D content, and that's something I don't expect to see on anything made since the PS2 era.