More recently, I came across a piece of scrap brass, already drilled with thousands of holes.
After months of reminders from Conker-X, I eventually brought my goggle bang up to the 1890s...
(This instructable only details my own goggles - Conker will be publishing his own goggles when he gets time.)
Step 1: Lenses
Drop the circles in place, screw on the frames, and they're done.
In practice, it was a little more involved, as I had to use my rotary tool to cut and grind some corners off to make them fit. If you do this with a power tool, you MUST wear proper eye-protection. With both the cutting and grinding wheels, I could feel a steady rain of particles on my skin, and hear them on my safety glasses. Hospitals might be able to remove iron filings from your eyes with a magnet, but I have no idea how they would deal with sharp pieces of brass.