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Flashcards in The Wet Eye Deck (13):

What are the three layers of tears?

Lipid layer
Aqueous layer
Mucin layer


What is the function of the lipid layer? What produces it?

Reduces evapouration of tears and is made and secreted by the meibomian glands found along the edge of the eyelid


What is the function of the aqueous layer and what produces it?

Nourishes the ocular surface and is made a secreted by the lacrimal gland and the accessory lacrimal gland


What is the function of the mucin layer and what is it produced by?

Produced by goblet cells in the conjunctival epithelium and helps the aqueous layer adhere to the corneal surface


What is the path of tear flow?

Glands across the corneal surface to the upper/lower lacrimal puncta through canaliculi into the lacrimal sac which connects to the nasolacrimal duct that has an intraosseous part and exits at the nasal planum


What nerve requires innervation to cause increased tear production?

Trigeminal nerve


What are the methods of irritating cornea?

Distichiasis, trichiasis, extopic cilium, foreign body, corneal ulceration, prolapse of the 3rd eyelid lacrimal gland, lymphoplasmacitic infiltrate of cornea, lymphoplasmacitic infiltrate of third eyelid, eyelid mass, entropion, blepharospasm


What does a lymphoplasmacitic infiltrate of the cornea look like?

Red, dotty appearance, blood vessels, immune mediated


What does a lymphoplasmacytic infiltrate of third eyelid look like?

Pigmented or not


How do you remove an eyelid mass?

Wedge/inverted horse resection if covering 25% refer, close with a figure of 8 stitch


How do acquired and congenital entropion treatments differ?

If young = tacking sutures
If acquired = surgical correction


What are the causes of tear drainage problems?

Eyelid abnormalities (euryblepharon, entropion, ectropion, diamond eye, eyelid coloboma/agenesis)
Nasolacrimal blockage
Retrobulbar or nasal disease
Third eyelid gland prolapse


How would you identify nasolacrimal blockage?

Unilateral chronic discharge
Dacryocystits (generally FB sometimes idiopathic)
Jones test identifies