The tear film is a complex mixture of substances that are produced by various sources on the surface of the eye, such as the lacrimal gland, accessory lacrimal glands, meibomian glands, and goblet cells. This film covers the surface of the eye, which includes the corneal and conjunctival epithelia, serving as a barrier between these … Read more
Many mechanisms exist to protect the eye from external injury. Mechanism of potential damages to the eye can ocular as: 1.Protection from mechanical damage The orbit: The eyelids: The corneoscleral shell 2.Protection from chemical damage Eyelid closure Bell’s phenomenon Tears Corneal epithelial barrier 3.Protection from biological damage Tear film and conjunctiva: Corneal epithelium and Bowman’s … Read more