1. Contact lenses have been around for more than 100 years and a lot has changed since they were invented.
Soft lenses (which are what almost everyone wears nowadays) are made from these hard poly hema (aka plastic) discs.
2. A computer controls a lathe that cuts the disc down to size based on the prescription strength.
The machine spins at 6,000 rotations per minute and uses an industrial diamond to shape the inner curvature (the part that touches your eye).
3. Then, they polish the lens with this spinning machine and an abrasive paste.
No sharp edges, please.
4. To make the outside curve, they coat the whole thing in this weird brown wax.
6. This machine that looks like dancing double-stuff Oreos polishes the lens again.
7. The hard disc is soaked in water for 24 hours which turns it into the soft flimsy thing you can actually use.
The lens only stays flexible if it’s continuously moist, which is why they can dry out if you sleep in them (among other horrible things).
8. That’s it! Aside from the soaking, the whole thing only takes about 15 minutes.