Figure 1.

Working definitions of suspicious eyelid lesion criteria: A) Loss of eyelashes: A distinct patch of eyelashes absent along the eyelid margin. This should not include lesions that only displace eyelashes, causing growth to occur in abnormal directions. B) Ulceration: An area of tissue breakdown or erosion resulting in a deformity that is depressed below the level of surrounding tissue. C) Infiltration: Abnormal tissue causing destruction and replacing the normal eyelid tissue, such that the overlying epithelium (skin or mucous membrane) has been replaced by other tissue that normally should not be found in that location.