If you wear different brands in each eye, start by selecting the brand you wear in your right eye. Enter the prescription for your right eye, and then uncheck the box next to "Left Eye". When you are done with the right eye, continue by clicking the "Add to Cart" button. You will be taken to the shopping cart and see the prescription you entered for your right eye. Now select the brand you wear in your left eye. Uncheck the box next to "Right Eye" and enter the prescription for your left eye. When you are done with the left eye, continue by clicking the "Add to Cart" button. You will be taken to the shopping cart and see the prescription you entered for your left eye. That's it, both eyes done!