I have prisms, 6 deg and was told not to get glasses with a middle line as it's hard to use the computer from where I sit. The teck who told me regular by focal would be better. The DR prescribed 8 deg of prism. when the glasses came I could not see. The teck that tried to fix them for me also thought that was to much of a change in prism, 2 deg. I was told to call for a appointment witch I tried today, they refer me to again the computer. I type in what they ask for and it does not confirm I have a appointment for the time the DR is their. I tried to get help from their chat line and the lady can't seam to help. I will stop payment and only approve the payment when the glasses I receive will help my vision.