To replace the traditional microscope, the researchers have created a mobile phone microscope, which they call the CellScope Loa. A smartphone is mounted on a 3D-printed base, which contains LED lights, microcontrollers, gears, circuitry, a USB port, and a slot for the blood sample. The researchers also created an app to be used on the smartphone, which connects to the base via Bluetooth. The gears position the blood sample in front of the camera, and software analyzes the resulting video to check for the telltale wiggling of the Loa loa worm. In about two minutes, the screen displays the number of worms it detected in the sample, which helps doctors give patients treatment that won’t endanger their lives.