Finding the perfect sunglasses

Photography by Karl LagerfeldAnja Rubik for Chanel, 2007
It's so hard to find the perfect sunglasses.  I haven't bought a new pair since 2008.  Usually I buy a pair every year, sometimes more because I lose them.  I spend ages trying to find my ideal glasses.  I don't mind which brand they are.  I've bought Chanel, Dior, Prada, Oliver Peoples, Cavalli, Marc Jacobs, Versace, D&G and Chloe in the