If you reread it, they said these things (anti-glare filters, ergonomic position, eye breaks) MAY help improve visual comfort, NOT remove it completely. Of course, there haven't been longterm studies, LCD screens have only been more available to the consumers for maybe 10 years because of cheaper production costs. It's like complaining about Hormone Replacement Therapy: it works to preserve bone but there are unknown longterm side effects, we won't know until later. Bam, later comes and these women have higher risk of breast cancer and Coronary Heart Disease, now it is not as common a treatment due to these effects. Who knows, maybe in 30-40 years we will see higher rates of Glaucoma or something, and they'll pin it down to LCD usage. We won't know until time actually passes. Remember, human eyes were not evolved the last 10000 years for the sole purpose of LCD screens.
If you're unhappy with my previous sources, here is a very good recent one: "A comparison of symptoms after viewing text on a computer screen and hardcopy." And texts were same size and contrast, also used the same target viewing angle and luminescence. Guess what, those with the screen reported more discomfort. Symptoms following sustained computer use were significantly worse than those reported after hard copy fixation under similar viewing conditions.
A comparison of symptoms after viewin... [Ophthalmic Physiol Opt. 2011] - PubMed - NCBI
You brought blind students into the conversation, not me. And teaching a blind student would be different from ones with sight. I didn't doubt the iPads will help the blind kids. You only tried to distract from the main point by bringing other points in to try to frame the iPad on the podium again like these kids MUST have this initiative. You attacked the PlayBook's size out of nowhere again to promote the iPad. You could easily say the Samsung 10.1" have the same mitigating factors because of its 10" size too. Maybe you are slightly blinded by your Apple devotion.