Taking Ozempic or Wegovy? Here's What to Know About Sudden Vision Loss
By Kapil G. Kapoor, MD, FACS, FICS, FASRS | Wagner Kapoor Institute
Who May Be at Greater Risk for NAION While Taking a GLP-1?
Risk Doesn't Exist in Isolation
When people hear that a medication has been “associated with” a medical condition, it's tempting to think about the medication as the only variable.
Human biology is rarely that simple.
NAION existed long before GLP-1 medications.
And many of the people who are most likely to be prescribed these medications already have conditions that can make the optic nerve more vulnerable.
Research has associated NAION with systemic factors including diabetes, hypertension, hyperlipidemia, cardiovascular and cerebrovascular disease, obesity and obstructive sleep apnea. (JAMA Network)
Notice the overlap.
Those are many of the same patients who may benefit significantly from modern metabolic therapies.
That's Why the Decision Has to Be Individualized
Imagine two patients taking the same medication.
One has no history of optic nerve disease.
The other has previously experienced NAION, has sleep apnea, diabetes and multiple vascular risk factors.
Those are not necessarily the same risk conversation.
This is why I don't believe patients benefit from oversimplified messages such as:
“GLP-1s are dangerous for your eyes.”
or
“There's nothing to worry about.”
Neither adequately represents the evidence.
Current research suggests a possible increased risk—particularly with semaglutide—but the condition remains uncommon. A 2026 analysis found a modestly higher NAION risk among GLP-1 receptor agonist users compared with SGLT2 inhibitor users while emphasizing that the absolute risk remained low. (JAMA Network)
What Should Patients Do?
If you're taking or considering a GLP-1 medication, make sure your healthcare team knows if you have:
- Previous NAION
- Significant optic nerve disease
- Diabetes
- High blood pressure
- High cholesterol
- Cardiovascular disease
- Obstructive sleep apnea
- Significant existing eye disease
That information doesn't automatically disqualify you from treatment.
It improves the quality of the decision.
The goal of medicine isn't zero risk. It's making informed decisions in which the expected benefit justifies the risk for the individual patient.
At Wagner Kapoor Institute, we believe eye care works best when it is connected to the patient's overall medical care.
For specialty ophthalmic care in Hampton Roads, call 757-481-4400.
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