The object (or particles) will always remain in the front of the eye. Some parents worry that it might get lost behind the eyeball. The space beyond the eyelids recedes ¼ inch (6 mm) and then stops. For people who use contact lenses for the first time, a common concern is that the lenses will come off and potentially move behind the eye and get stuck.
While it's possible for a contact lens to stick to the surface of the eye, the good news is that there's simply no way it can get lost or trapped in the back. The eye's own anatomy acts as a barrier, ensuring that the lens always remains on the surface, so you can recover it quickly and easily.