The scaling associated with Seborrheic dermatitis can look like debris in the eye lashes.
Bacterial infections, such as staphylococcus epidermidis, may be present if there is debris in the eye lashes.
Demodex mites can leave behind debris in the eye lashes: their dead bodies, their feces, and the bacteria that are harbored in their bodies. Cylindrical dandruff around the base of the eye lashes is commonly associated with demodex mites.