Water droplets maintain their spherical shape and optical properties when placed on a hydrophobic surface made by coating a glass slide with electrospun PVC fibers. The optical properties can be changed by simply adjusting the volume of water in the droplet. 

These dynamically adjustable water-based lenses have many potential future uses, from classrooms and research labs to cameras and wearable gadgets.

NUS Medicine study uses AI to modify drug doses for personalised cancer treatment