When a bowler wears sunglass batsman can't see his eyes . If you are a batsman , you can't really see where the bowler is looking at or aiming to bowl . Bowlers get Small Advantage over batsman's Anticipation . In cricket Small Advantages can always be costly . This is totally against the spirit of cricket . You can tell they are wearing it on purpose .
Indian spinners use this trick . Now English spinners are doing this in Ashes .
Ashwin and all the other Indian spinners always bowls with Sunglass on -
Now English bowlers are doing the same in Ashes . Swann -
True Legends don't need sunglasses to trick batsman -