The Eye IV (Accessory Structures)

Question 1

What is the function of innervated follicles in the eyelashes?

Answer 1

Sense movement of eyelashes to warn of potential damage

This initiates a blink reflex

Question 2

What are the glands of Zeis?

Answer 2

Sebaceous glands that secrete an oily substance that empties into the follicles

Question 3

What are the functions of the eyelids?

Answer 3

Spread tears and other secretions to lubricate eye, moisten it, and clean eye surface
Protect the eye from foreign particles and objects
Protect the eye from bright light

Question 4

What is the function of the levator palpebrae superioris, orbicularis oculi, and ocular muscles in the eye/eyelids?

Answer 4

Levator palpebrae superioris - tendon inserts into the eye, opens the eye
Orbicularis oculi - muscle fibres within palpebrae, closes eye and compresses tear glands
Ocular muscles move the eye

Question 5

What is the conjunctiva?

Answer 5

Mucous membrane: Secretory epithelium with underlying connective tissue
Secretes mucous to lubricate surface of eye

Question 6

What are the five different glands at the eye? What is their overall function?

Answer 6

• Glands of Zeis (sebaceous), conjunctiva (mucous), tarsal (Meibomian) glands (sebaceous glands within eyelids), lacrimal caruncle (sebaceous and sweat glands), lacrimal glands (tears)
• All work together to create a solution of water, oil, polysaccharide, antibacterial agents, and enzymes to lubricate, moisturize, clean, and protect the surface of the eye

Question 7

What enzyme to tears contain? What is the function of tears?

Answer 7

Lysozyme

Moisten, clean, lubricate, and protect the surface of the eye