Recently featured in Wired magazine, you will need a microscope to see these glasses. This is a 2mm frames sporting a 0.1mm logo, seen here pictured on a house-fly. The logo is the equivalent size of a human hair, and was lazered onto the frames using, from a stationary machine, whilst the frames were moved around using a positioning machine.
Looks as though this was a warm-up act by German company Micreon for their next trick: to engrave tiny lettering onto watch faces. Reminds me of the artist Willard Wigan, who creates sculptures too small for the human eye to see. One of his works that I saw was set on a plinth which was the eye of a needle, and the sculpture itself was of a ship whose ropes were made out of spiders web strands. He gives a fascinating talk here.
We’ll be sticking to the day job of choosing the best styles and designs that suit your eyes and wardrobe, which means you probably won’t find these bug-eyed glasses at Glasses Direct for the foreseeable future