Glands of Zeis are unilobar sebaceous glands located on the margin of the eyelid. The glands of Zeis service the eyelash. These glands produce an oily substance that is issued through the excretory ducts of the sebaceous lobule into the middle portion of the hair follicle. [ http://en.wikipedia.org/wiki/Gland_of_Zeis ]
Synonyms: gland of Zeis gland of Zeiss Zeis gland ciliary sebaceous gland of eyelid