It's costly when you have to regularly change your prescription lenses, particularly with heavy computer use leading to astigmatism. So the idea of adaptive lenses whose strength can be adjusted with a twist of the dial on the side is certainly a novel and inspired one.
Adlens' adaptive-lens eyeglasses have hollow lenses with a clear plastic sheet stretched across on the inside. Twist the dial, and fluid pumps in between the sheet and lens, creating a high refractive index. More fluid means more curvature, which means more powerful lenses. When the oil is pumped back out, the lens curvature … Read more