Well, generally speaking, the crust in your eyes can be a sign of blepharitis. And you just need to be careful about it. According to some recent researches, blepharitis can just cause the eyelids to be swollen and scaly-appearing at the base of the eyelashes. Of course, you need to know that if the scales become coarser, the surface of the eye becomes irritated and forms crusts. So we can say that crusts come from scales, and it may be because of eye irritation. And discomfort in your eyes can just bother you. In my opinion, you should just have some cool tea bags with some cold compresses.