Visual/Lingual Teasers are, disappointingly, not the latest trend in porn but are instead like brain teasers involving the eye and more broadly the linguistic system.  They’re not quite brain teasers though, they’re just teasing a few subsystems.

Why is it so esay to raed wrods eevn wehn the lteetrs are mdduled up?

An email has been doing the rounds, claiming that “Aoccdrnig to rsceearh at an elingsh uinervtisy, it deosn’t mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer is in the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit graet porbelm. Tihs is bcuseae we do not raed ervey lteter by itslef but the wrod as a wlohe.”

(from: http://www.guardian.co.uk/science/2003/sep/25/thisweekssciencequestions)