Just enter the website ZenniOptical.com and follow the navigation to choose the type of eyeglasses you want to get from the category. You may asked to select the color and material of the lens and frames. And make sure whether you want to add some coatings to the lenses. After that you are required to fill out your prescription which you can get from your eye doctor. And then follow the steps to finish your order.
1. You shall first go to their sites ZenniOptical.com
2. click their category on the left side of the homepage to help you choose your favorite eyeglasses frames.
3. click the images of the glasses frames you wish to buy. then check their frame size and choose color and other adds on of the eyeglasses.
4. Input your prescription information and then add to cart.
5. Check the items if the one you want. If so, go the the order for payment.