I love to make my own poppers and bass bugs and though I'm not a perfectionists I like them to look somewhat real, here's why; Big bass will often take some time to examine what they're browsing on before striking. Mature fish that have encountered different baits and lures in the past will turn away from common baits at over-crowded spots. Who knows maybe the shimmering realistic look of an eye may make the difference between a strike and no fish for dinner.
The How - To
Once the polish is somewhat dry, use your finger and carefully indent the top of the bulge to give yourself a flat surface to add the black. Then add the black fingernail polish, I like to place the black dot in various sizes and places on the silver polish to give the impression of looking in a direction. Apply in the same manner for the remaining pupil globs.
This is important, allow the eyes to dry for 24 hours.
If you try to peel them to early they will bend and distort.
Once they are fully dry the next day they're ready to go. They can peeled (as seen above) and gently pressed onto your lure of choice.
The last step is simply to seal them in with clear base fingernail polish. (Make sure you use the cheap stuff!)
I like to glob mine on extra thick to give some depth to the look of the eye.
Allow to dry for 30 minutes and your all set.