Now let's talk about allergic conjunctivitis or allergic pink eye.
This is noninfectious. The patient will not spread this to other people.
This is caused by allergies and it's a local response to the pollen, perfumes, smoke, eye drops.
Anything that's irritating this patient's eye in an allergic way.
This is gonna cause histamine to be release from the mast cells and the small vessels are going to vasodilate.
Remember, this is not contagious.
Patients will classically come in with allergic pink eye and have excessive itching of their eyes.
They've been rubbing at their eyes all day and this also causes some redness.
Now, this is the symptom that really scares patients.
It's called conjunctival edema or chemosis.
And this is where the eyeball can actually get a little bit swollen and change shape and look a little bit lumpy.
And it's not serious but it does worry patients.
It's usually bilateral and the patient should not have any eye pain.
Remember, itching is the hallmark.
And the patient may have other allergic symptoms such as rhinitis which is a runny nose.
They won't have a fever and they may have some sneezing.
So how do we care for allergic conjunctivitis? Just basic eye care.
I give my patients a cool compress and have them irrigate with, you know, a cool substance.
Topical antihistamines, eye drops with mast cells stabilizers are used
and NSAIDs can help decrease that inflammation.
The last type is an irritant pink eye or a chemical pink eye.
This is also noninfectious; cannot be spread.
This is caused by lots of things.
Sometimes a chemical splash in the workplace or at home, a foreign body.
Chlorine, when patients go swimming, a lot of times their eyes will turn red.
And sometimes makeup can have this effect.
And remember, this cannot be spread. This is not contagious.
So patients will come in and they will have excessive lacrimation, right?
Increased tearing or watery eyes. They're gonna have some eye discharge.
And depending on the chemical, they may have some eye pain.
How do we manage this? We need the patient to flush their eyes.
And sometimes this is for 10 to 15 to 20 minutes and this is also an irritating procedure.
You're gonna follow the eye care recommendations of the material safety data sheet
or the MSDS for whatever substance was in their eye.
And you might need to call the poison control center
and seek professional care if it's a caustic irritant.