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"A UCLA engineer hoping to make medical diagnoses a snap turns a smartphone into a powerful microscope with new software, a few LEDs and a test chamber made by a 3-D printer. (Brinson + Banks)"
"lens-free digital microscope ($40)"
"home fertility testing. One of his devices, a lens-free 3-D video microscope, recently mapped the never-before-seen helical swimming patterns of sperm cells"