Yeah, I guess that's what it's called. Definitely not as warped looking as the wiki picture, and have never been told it's given me any negative effects (it's only 1-2 1/2"). Can't hurt! Again, he wasn't responding to you specifically, just using your comment - and one of the easy ways to read it - as a jumping off point. And it's certainly a viewpoint that others have repeatedly expressed on this forum, so it was worth saying (particularly in ADHD/ADD threads). Thanks Aug.