First-ever artificial eyelid mimics the blink of an eye
In a first, University of Pennsylvania researchers have used human cells to build an artificial eyelid that mimics blinking. The faux eyelid, made of a hydrogel film, spreads tear fluid over the cells while covering and uncovering the eyeball. This synthetic eye could be used to study dry eye disease, which affects 16 million adults in the US, said researchers.