You will need :
Star with a base coat ! As usual. Mine is from Hema
Apply two coats of a silver nail polish. Wait after the first coat and after the second one wait more ! Read my other guides for example ;)
Make big dots with the white. It don't have to be perfect, you're not in arts school !
When dry add blue dots with the big side of the dotting tool
And with the small part, add black dots ( for the pupil )
Add details, a small white dot for the reflection and red veins.
Don't forget the top coat !
And you're done ! Hope you like it. Of course you can change the colors of the background and the eye.
The creator of this guide has not included tools