Clearly: A short history of eyeglasses and how a moonshot idea can change everything

Poor vision is the largest unaddressed disability in the world today. An estimated 2.2 billion people, almost a third of the global population, suffer from poor vision because they don't have access to a simple pair of glasses - a solution that has been around for centuries. It is an issue the world has ignored, even though tackling it would transform countless lives - helping children to learn, improving gender equality, increasing productivity, and ultimately reducing poverty.

The world is...