Group of at Texas A&M University designed an otoscope using 3-D printer which is far cheaper and willl greatly assist in diagnosing hearing losses around the globe. This otoscope, when plugged with smartphone, takes photos inside the ear. Smartphone usage is what makes the otoscope so cheap.

Source: http://engineering.tamu.edu/news/2016/05/17/students-design-low-cost-otoscope-to-help-diagnose-hearing-loss-in-developing-countries

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