Eyelash
A small hair at the edge of the eyelid — a tiny piece of protection between the eye and the air.
An eyelash in a dream is the dream's image of a very small but specific protection between you and the world. Eyelashes are not impressive on their own; what they do is keep particles out of an organ that cannot afford particles. The dream brings the eyelash when there is a tiny defence in your life — a small habit, a single polite phrase, a particular friend — that is doing more than it gets credit for. An eyelash intact is the dream telling you the small defence is in place. An eyelash stuck in the eye is the dream noting that the same small thing meant to protect you has, in this instance, become the irritant.