I've got a sheet of Archer eyeballs. I found them so fiddly and hard to use, I gave up and have never actually used them on a figure.

Funny - I've had them too for years. Juat sitting here. I have a feeling they will make it look loke a doll

https://hobbyisthaven.com/products/adjustable-5-lens-led-light-headband-magnifier-glasses

My computer skills are really poor so I hope this link works. I bought this magnifier last year and it works great. I don't know if the sale price is still in effect but it was well worth the money. Not sure if someone might have an issue with this but the well packaged visor is shipped from China and arrives in about 3-4 weeks.

For those who say that they paint the eyes first or last and that's that, I envy you.

I paint them first, then a couple times while painting the face and then a time or two at the end.

I have seen these for sale under different names and prices on Amazon.