<prompt> Oily layer of the tear film is formed by-Meibomian glandsConjunctival goblet cellsLacrimal glandsNone  <response>: 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. 