EYELID

Macroscopically, the slide is similar to a lip or ear pinna. Therefore, it is necessary to microscopically examine the covering epithelium. The stratified squamous thinly keratinized epithelium belongs to the epidermis, whereas the stratified columnar epithelium is typical of the conjunctiva. In the dermis, cutaneous adnexa can be found: small hair follicles, sebaceous glands associated with them, as well as small sweat glands are found on the ventral side of the eyelid; the free margin of the eyelid contains large hair follicles of the eyelashes, Zeiss' (sebaceous) glands, and Moll's (modified apocrine sweat) glands. Under the cutaneous surface is the skeletal muscle of the orbicularis oculi muscle. Beneath the mucosal surface is a dense connective tissue plate (tarsus) containing the large Meibomian (sebaceous) glands. The smooth Müller's (tarsal) muscle can be found at the upper edge of the tarsus. Occasionally, the parenchyma of the lacrimal gland, consisting of serous acini and intra- and interlobular ducts, may also be seen.