When this is happening you'll see a little padlock symbol at the bottom of the browser - this means that your details are totally safe from prying eyes and that only Readoptics.com can see them. Some browsers don't have this symbol, so if the address of the web page starts with https, this also confirms you're secure. This method is the recognised standard for secure transactions.
However, if you're still wary or have any questions, you can contact us where one of our helpful Read Optics team will be more than happy to help.