A smartphone hardware lens add-on making blood analysis and malaria detection portable and cheap. The power of computer vision coupled with microscopy. Built for YC Hacks: <b>http://ychacks.challengepost.com/submissions/25781-athelas</b>. For the lens, here's what I used: <b>http://www.edmundoptics.com/optics/optical-lenses/ball-condenser-lenses/n-bk7-ball-lenses/2041</b>. Basically, I took a piece of rubber, poked a hole in it, and fit the lens in.