Spork, for what it's worth, i too used many pairs of sunglasses that still let a lot of spray into my eyes, and although they helped with the UV, i found my eyes were just as red with all the salt water. So i went to swim goggles and they were great for keeping the water out but have really bad periferal vision, i kept loosing my kite from view. My best solution yet is the aqua sphere seal swim mask http://www.swimoutlet.com/product_p/1427.htm
, I have the tinted lens to help with the UV and I use spit to keep them from fogging like regular masks (haven't fogged yet, but I am in a warm climate). They also have great periferal vision, can't even see the frames!
definitely get a leash for them on hard crashes. Another bonus from using them, since i kite in shallow water with coral all over I sometimes dunk my head to see where the shallow spots or the sea urchins are... As well as when my bar is all tangled up or my safety is engaged, I use the mask to do it underwater... Otherwise my eyes have been the whitest since I started and I love it!!
And to the style haters: I'm not proud of it but me and spork will be laughing our asses off as you head into eye surgery due to sun and salt damage, if it is even fixable... (has already happened to one of my friends who's a pro, blind as a bat now...)