3D Fit is a mobile app from Glasses.com that enables you to see how glasses look on your 3D model via augmented reality. Set to be released in the near future, the app works by creating a precise 3D model of your face, letting you see how you look in a variety of styles of frames from numerous angles.
Simply take a video of your face using an iPad, by rotating your head to the left, then the right, and the app will immediately develop a 3D rendering of your face from both sides. Then, instead of traversing the online catalog to choose glasses for your face, you will automatically get to see how the selection looks on your face. You can then either scroll through the different looks on your iPad, or click on any of them to get more details on colors and selection. You can even add a look you like, to your favorites. Additionally, you can choose to add Instagram-like filters to see how the glasses would look like under different lighting conditions.
Here's a video demonstrating the mobile app:-