I happened to find this amazing little device this morning. Its called a Lytro Camera and its a light field camera. Unlike a conventional camera that captures a single plane of light, the Lytro camera captures the entire light field, which is all the light traveling in every direction in every point in space.
By instantly capturing complete light field data, the Lytro camera gives you capabilities you’ve never had in a regular camera. Basically what it means it allows you to focus after you have taken the image. It creates interactive images that allow you to click on the image to control focus. Anyway, I cant show you how it works because I dont own one yet but pop over here to their website or even here to see some examples!