A group of biotechnologists from the University of Cambridge, led by Professor Keith Martin, succeeded in the seemingly impossible: they printed the cells of the retina of a rat eye on a piezoelectric inkjet printer.
As it turned out, the retina is a special structure in which the cells are arranged in a strictly defined order, which makes it possible to correctly read the image. In this experiment, rat retinal cells became the starting material. Using a special piezoelectric inkjet printer capable of producing sheets of living cells, the scientists recreated a crude resemblance of the retina, while recording every step on a video camera.
Later, after carefully analyzing the result obtained, the scientists improved the printing program several times until they got the maximum similarity of the copy with the original.
The experiment continues. Next in line are experiments on "unsealing" of other types of retinal cells - light-sensitive receptors - rods and cones. If successful, a unique technology for restoring vision after injury will appear.
It should be noted that this is not the first experiment in printing biological elements. Scientists have already managed to print an artificial liver that has functioned properly for 40 days.