Traditional pacemakers contain electronic circuits consisting of batteries and wires, which can cause problems such as tissue damage and restricted access to different parts of the heart. A new device that converts light into electrical signals enables heart cells to be stimulated more precisely without the use of batteries.
The pacemaker is made of flexible optical fiber and silicone membrane, and its thickness is no more than the thickness of a human hair. Unlike solar panels, which harvest energy from any light, the new device produces electricity only where the light hits, allowing for more precise regulation of heart rate.
Source: Ferra
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