According to their calculations, this glass performed about as well as a heavy duty commercial glass. What this report describes isn’t some miracle material, but a well-above-average performing glass that seems promising on a tiny scale.
Although the first gravitational lens wasn’t discovered for some 40 years after it was first theorized, it’s now the most prolific tool for weighing distant (foreground) galaxies, and discovering ultra-distant (background) galaxies. Although this isn’t a technique we have precision control over — the Universe puts the lenses and the lensed objects where they are, and all we can do is watch — there’s a spectacular amount of material that’s out there
The shortest distance between two points is under construction. -- Noelie Alito