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Researchers are working on a self-calibrating endoscope that can capture 3D images of objects smaller than a single cell. The device in question works with optical fiber technology. This new technology makes it possible for the endoscope to take pictures in the body without a light source. Furthermore, the device can measure 200 microns. Such a measure is comparable to three strands of human hair twisted together.

The device is best suited for optogenetics. Which is a research strategy that uses light to simulate cellular activity. Because of this the tool is equally useful for monitoring tissues and cells during a medical procedure, and for technical inspection also.