Lacrimal System Function (M1)

Question 1

What does the mucoaqueous layer maintain

Answer 1

Health of corneal and conjunctival epithelial cells
- provides nutrients to underlying avascular corneal tissue when sleeping
- flushes away epithelial debris, toxins, and foreign bodies
- acts as the first line of defense against microbial infections

Question 2

What does the mucoaqueous layer provide

Answer 2

smooth refractive surface for clear vision

Question 3

what does the mucoaqueous layer protect against

Answer 3

mechanical shock

Question 4

what does the mucoaqueous layer aid in

Answer 4

lubrication for the eyelids during blinking - prevents chafing

Question 5

what does the lipid layer prevent

Answer 5

evaporation of tear film, thereby increasing the stability of the tear film

Question 6

what does the lipid layer create

Answer 6

barrier at the lid margin
- prevents spillover of tears at the lid margin
- prevents migration of lipids produced by facial skin onto ocular surface
- forms a water-tight seal when the eyelids are closed

Question 7

what does the lipid layer aid in

Answer 7

lubrication for eyelids during blinking