cycling glasses

hi, I am looking to buy some cycling glasses to protect my eyes from the flies, bugs, and dirt that seems intent on working its way into my eyeballs. I bought some cheap safety type glasses and found they made me feel sick as the vision was distorted from normal. Can anyone recommend some reasonably priced glasses that do not distort your vision. Any makes / ideas would be appreciated
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http://www.rutlandcycling.com/11871/Pol ... asses.html
The DHB triple lenses are well rated as well. Wiggle sell them
Cheehee
They're prescription as well, and you can choose the colour of the tint.
They set me back about 200 pound 2 years ago, so I find that reasonable
http://cgi.ebay.co.uk/ESS-ICE-Tactical-Sunglass-BNIB_W0QQitemZ120390873088QQcmdZViewItemQQptZUK_Collectables_Militaria_LE?hash=item120390873088&_trksid=p3286.c0.m14&_trkparms=72%3A1684%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318
Pro-lite rovigo's tick all these boxes. Go to http://www.chainreactioncycles.com/Models.aspx?ModelID=29100
for details