I currently have two pairs of quality sunglasses. I have a pair if Maui Jim's and a pair if Costas.
The Maui Jim's have been awesome the costas have been good up until a couple of days ago. The lenses started fogging/distorting. I initially thought it might be a sunscreen film. I washed them with Dawn and warm water but that didn't work. I went to alcohol and cotton balls and that didn't work. My son, who has much better eyes noticed almost a crackle pattern on the lenses. They are warranted for life so I'm sending them back. We'll see.