There is definitely a real issue here for some people, myself included.
I have just purchased a 2011 MBP 13" with the glass panel, and notice almost immediate eye strain followed by headaches within 5-10 minutes !
I've had mac laptops for about 10 years now, Powerbook G4 matte displays, 2006 black Macbook glossy without the glass, and have never had any issues, even after +5 hours in front of the screen...
I've done side by side A/B tests at home with low lights to minimize glare and different screen brightness settings and I can say for sure, I have a problem with the 2011 screen ( which btw i believe is the same screen since 2009 unibody MBPs, so its not something specific to the 2011 model ).
I wonder if this is due to the glass panel or perhaps the LED, since my 2006 macbook is LCD.
I'd also like to mention that i am a bit nearsighted and wear mild corrective eye glasses, this could also explain why i'm affected by this and not others..
Needless to say i am seriously considering returning the computer despite being content with all the rest...
