2014 adjustable liquid lenses: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933712/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933712/ Describes both a dia

2014 adjustable liquid lenses: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933712/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933712/ Describes both a dial-based and a less mature fluid-based technology: https://www.youtube.com/watch?v=D9FpEWQkg-w https://www.youtube.com/watch?v=D9FpEWQkg-w Dial-based: https://www.designboom.com/technology/eyejusters-self-adjustable-glasses-for-the-developing-world/ https://www.designboom.com/technology/eyejusters-self-adjust... DialVision review: https://www.youtube.com/watch?v=Ge3H0FtGUw8 https://www.youtube.com/watch?v=Ge3H0FtGUw8