While most biomedical research projects involving 3D printing have access to immense budgets, one team of Texas students just proved that even low-cost desktop 3D printing can have a huge impact on the medical world. For just $6.42, they can build a 3D printed otoscope smartphone attachment, which can help diagnose preventable hearing loss. A perfect tool for doctors and patients in developing countries where a lot of people have smartphones, but hardly have access to medical care.