Oily layer of the tear film is formed by-
Ans. is 'a' i.e., Meibomian glands * The major function of lacrimal apparatus is to secrete and drain the tear. Tear film consists of 3 layersi) Mucous or mucin layer (innermost) Secreted by conjunctival goblet cells, crypts of Henle, glands of Manz.ii) Aqueous layer (intermediate) :- This forms the bulk of the tear. It is secreted by main lacrimal and accessory lacrimal glands.iii) Lipid layer (outermost) Secreted by the Meibomion, Zeis, and Moll glands.
Meibomian glands
Conjunctival goblet cells
Lacrimal glands
None
Lacrimal Gland