These are sold in sets of 2 unless you choose the "single" option, in which case you only get one. LED eyes come with LEDs already installed, and wired up to a battery pack. 3D Eyes will achieve a following effect once painted and eyelids installed, and opaque eyes are used for a blind look; they're not meant to be painted on.
You can NOT see through these eyes! All of these eyes are meant to be used for tearduct vision masks.