Anissa's Fun patches was developed in search of a perfect patch for Anissa. Their tagline is: Your source for Eye Patches which are fun and comfortable.
When we first tried out this patch it seemed that my daughter could peek but with a little bit of positioning I found a position that was fully occlusive and practically peek proof.
The only time Belle could peek with these was if her glasses slid down - which is something that she will purposely do in order to peek. If there is a way to peek, she'll do it. Thankfully most often she didn't have the urge to peek or ask me over and over to remove it because she liked wearing the patch.
To order these fun patches go to Anissa's Fun patches where there are instructions to order by phone, email, or mail. Alternatively you can purchase via their ebay store.
You can also read another mom/child review of Anissa's Fun Eye Patches over at Little Four Eyes here: http://littlefoureyes.com/2009/05/01/week-2-anissa%e2%80%99s-fun-patches/