Another really cool medical use for the iPhone has been developed by a group of researchers at the Massachusetts Institute of Technology. This one is capable of detecting cataracts in a user’s eyes. More than simply an iOS app, however, this creation comes as an accessory that snaps on to the front of an iPhone and uses its screen output to test for and monitor the development of cataracts, the leading cause of blindness around the world.

Pocket First Aid & CPR provides two main functions. First, it’s a training tool. It includes photos and videos of proper first aid procedures for numerous situations, including CPR, animal bites, choking, etc. The second function is as a database of your health information. You can store information about yourself and others, including blood type, insurance, allergies, emergency contacts, and more.