The conjunctiva is a transparent mucous membrane that lines the inner surface of the eyelids ( palpebral conjunctiva) and the anterior surface of the sclera ( bulbar conjunctiva). It is also lined by pseudostratified ciliated columnar epithelium. The nasolacrimal duct delivers the lacrimal fluid to the inferior meatus on the floor of the nasal cavity.It is lined by pseudostratified ciliated columnar epithelium and contains numerous goblet cells. The lacrimal sac is the dilated portion of the duct system.They are lined by stratified, non-keratinized squamous epithelium. The lacrimal canaliculi drain the lacrimal fluid away from the surface of the eye via the lacrimal punctum.Tears are composed of water and lysozyme, an antibacterial agent. It secretes lacrimal fluid (tears) via ducts that open into the conjunctival sac at the lateral portion of the superior conjunctival fornix. The lacrimal gland is a serous, compound tubuloacinar gland that resembles that parotid gland.The lacrimal apparatus is composed of four parts: Dry eye syndrome is the most common eye disease, and if untreated, it can cause corneal ulcerations, scarring, and even perforation. ![]() The lacrimal apparatus of the eye produces lacrimal tears in order to prevent dehydration of the eye. Tears are produced by the acini (Ac) and enter the ducts (D), which them to the surface of the eyeball. The lacrimal gland is subdivided into lobules by connective tissue septa (Se).
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