My name is Dan, and I am a veterinarian. Today and I going to help you understand why your dog's eye is not healing and now your vet can fix your dog's eye.
Indolent corneal ulcers in dogs (also called Boxer ulcers, spontaneous chronic corneal epithelial defects – SCCEDs, or non-healing corneal ulcers) are a frustrating but common eye problem in middle-aged and older dogs. Here’s a clear breakdown for you:
What They Are
A corneal ulcer = an open sore on the clear surface of the eye.
In an indolent ulcer, the surface (epithelium) does not stick properly to the underlying corneal layer (stroma).
Because the edges don’t adhere, the ulcer persists or keeps recurring, often lasting weeks to months if untreated.
Which Dogs Are Affected
Common in Boxers (hence the nickname), but can occur in any breed.
Middle-aged to older dogs are most at risk.
Clinical Signs
Squinting or keeping the eye closed (blepharospasm)
Redness (conjunctival hyperemia)
Tearing or discharge
Cloudiness in the cornea
The ulcer is usually superficial but won’t heal normally
Diagnosis
Fluorescein stain: ulcer edges stain irregularly and may lift up (“loose epithelium” seen under magnification).
Ophthalmic exam shows the defect, often with a classic undermined edge.
Treatment Options
Indolent ulcers don’t heal with drops alone – the abnormal epithelial edge must be removed or disrupted so new cells can stick down. Common approaches:
Debridement (often with a sterile cotton-tipped applicator or diamond burr) – removes loose epithelium.
Grid keratotomy / punctate keratotomy – tiny scratches made in the corneal surface with a needle to encourage adhesion.
Diamond burr keratotomy – a rotating burr to polish and roughen the cornea for healing.
Bandage contact lens – protects the cornea and relieves discomfort.
💡 Most dogs need multiple treatments before full healing.
⏳ Healing Time
With proper treatment: usually 2–6 weeks.
Without intervention: ulcers can drag on for months and risk infection or deeper ulceration.
⚠️ When to Seek Help Quickly
Sudden worsening of squinting or discharge
White/yellow spot (infection or melting ulcer)
Eye looks “sunken” or bulging
These can signal an emergency corneal perforation.
Would you like me to also make a simple client-friendly handout style summary (like something you could give to a pet owner), or a deeper veterinary-level review with references?
AI Generated·May contain errors
Video Summary
AI Generated
Veterinarian Dan explains the nature of indolent corneal ulcers in dogs—ulcers that fail to heal naturally. He describes the anatomy of the eye, why some ulcers become stagnant, and how a professional procedure using a diamond-tip burr can remove non-healing tissue to stimulate a proper recovery and prevent potential eye loss.
Hey guys, my name's Dan, I'm a veterinarian,
and if your dog's eye is not getting better
after being scratched or having a corneal ulcer,
it's considered an indolent ulcer.
In this video, I'm gonna show you guys
how a veterinarian's gonna fix that.
I'm gonna draw it out for you
and make it really, really simple.
Let's look at the eye.
We're gonna do a side view of the eye,
something like that,
and this is gonna be the front,
and we're gonna have our cornea right here, the thin part,
and then everything else is gonna be going into the head,
so muscles going into the head.
We're gonna have an iris right here,
a blue iris with a little pupil in the middle
for light to come through,
and then we're gonna have a nice big lens
to allow the doggy to see close and far away.
We'll put some cilia fibers on there
to hold the lens in place.
So what's gonna happen is
the doggy's gonna see something out here,
and vision-wise, it's gonna come through with the light
and be reflected under the retina,
and the doggy will see.
Now, the problem is when a dog scratches their eye
or has a cornea ulcer that's not getting better,
it affects the cornea, which is right here.
This is our cornea.
What we're gonna do, everybody,
is we're gonna zoom up on the cornea.
We're gonna take a little box.
We'll say right here to right here.
We're gonna box this sucker up,
and we're gonna bring it over here,
and we're gonna zoom up on it.
Now, this is our cornea.
This is a part of the eye that's clear.
The dog sees through.
It's very similar to our cornea.
What you're gonna have is you're gonna have
a thin layer of epithelial cells on the outside,
keeping the eyeball safe,
and in here, guys, we're gonna have the stroma,
which is hydrophilic.
It loves to pull fluid in.
That's why when a veterinarian stains your dog's eye,
you will see the dye collect like so, whoop,
and when a veterinarian looks at the eye directly on,
they will see the stain collecting,
and that's how you diagnose an ulcer.
Here's the deal.
When you have an ulcer, guys, and it's not getting better,
this area right here, it should be bridging the gap.
The cornea should wanna grow over the top, like so,
and connect with the other side.
It should seal this over,
because this hurts, it's uncomfortable,
and it can lead to infection and possibly loss of the eye
if the cornea ulcer is not fixed.
In most cases, cornea ulcers are uncomplicated,
and this is fixed with eye drops,
like tobramycin, or a handful of other antibiotic eye drops
can be really effective at keeping the eye healthy
and letting it heal.
If it doesn't heal, it's a corneal ulcer that is indolent.
Indolent just means not healing.
Indolent ulcers, guys, here's what happens.
In most cases, the eye should be healed
in about five to seven days.
If it's indolent, it fails to heal.
It could be for a handful of reasons.
Maybe there's debris in the area where the ulcer is.
Maybe you have a bad basement membrane,
which is the scaffolding,
which allows it to heal over the top, whatever.
Something is causing this to happen.
The cornea does this, and it grows upward,
and then it kinda just sloughs off in chunks,
and it goes, and it just sloughs off in chunks,
and you have that ulcer down here
that is still pulsating and a problem,
and sometimes you'll see the ulcer
kinda creep under the epithelial tissue,
and you get a little halo effect,
and it's just getting worse,
and at this point, the doggie's uncomfortable,
and everybody's just stressed out over it.
Here's what a veterinarian's gonna do, guys.
They're gonna come in with their diamond-tip burp,
and guys, no joke, this diamond-tip burp
looks like this, like a little piece.
It has a big circle on it,
and it's all jagged all the way around,
and it spins.
It rotates, almost like you're drilling for oil.
So what this thing's gonna do
is it's gonna bring this diamond-tip burp over,
and we're gonna place it right here,
and we're gonna go,
bzzz, and we're gonna burr this all up,
and as we burr it up,
all this tissue that didn't wanna heal
is gonna get sloughed off.
It's just gonna get sloughed off.
We're gonna burr this all off.
We're gonna get it out of the way,
And if we have any concern about any of this tissue,
we're just going to keep burying and burying and burying
until we clear everything off that is suspect.
It doesn't want to heal.
As my young nephew would say, sus.
Here's what we got.
We got that all burned off.
We're going to stain it now.
And when we re-stained everybody,
the stain is going to be huge now.
Cause we just did more damage to the eyeball.
We not only reset the ulcer, we made it bigger,
but we made it bigger so it could heal.
So we burned it all off.
And now, instead of having tissue
that just does not want to heal or do anything,
we have tissue, everybody,
that wants to heal over the top and cover up our ulcer.
We're finally healing, which is super exciting.
Now it all heals.
The veterinarian goes to stain it
and the stain goes drip, drip, and it drips right off.
And you, my friends, have a healed corneal ulcer.
Healed corneal ulcers like this,
once you burn them, they heal pretty quickly.
If you do a lot of burning,
it can take a week or two to get it healed.
Cause you have so much tissue
that needs to be sealed over and healed over.
You might have some scar tissue as well,
but overall guys, these can be healed
and they can be healed quite easily with a diamond tip bur.
Some veterinarians still use like a 25 gauge
to do a grid keratotomy
by scraping the back of the bevel.
Not the best option.
Diamond tip bur is definitely superior.
Hope this was incredibly helpful
and hopefully it blew your minds as well.
As always guys, my name is Dan, I'm a veterinarian.
Thanks for watching.
I greatly appreciate it.
You guys take care.
Bye.
