Meet Andy George, the modern day MacGyver whose YouTube show, How to Make Everything, features him making everyday goods from scratch. Past episodes have featured George creating items like a quill pen, a chocolate bar, and a suit—all in the name of understanding the “complex processes of manufacturing that is often taken for granted,” his Facebook page explains.

In the video above, George consults with science writer Lewis Dartnell, author of The Knowledge: How to Rebuild Civilization in the Aftermath of a Cataclysm, to learn how to make a pair of homemade spectacles. Watch George fashion glass from foraged materials like limestone, hardwood ash, and sand; shape the fragile substance into prescription lenses using a series of abrasive wheels; and whittle a pair of surprisingly cosmopolitan-looking wooden frames.

[h/t How To Make Everything]

Banner image: iStock