GLP-1 Medications and Your Vision

GLP-1s (glucagon-like peptide-1 receptor agonists) are a popular prescription medication used to lower blood sugar in people with type 2 diabetes and, in some cases, to support weight loss and management. Today, about 6% of U.S. adults take a GLP-1.

These medications can be highly effective for managing blood sugar and weight, but they may also have implications for eye health, especially for people with diabetes or existing eye conditions. A comprehensive eye exam with a doctor of optometry is a critical step in detecting early changes and protecting your vision over the long term.

How GLP-1s Affect Eye Health

For most people, GLP-1 medications are safe and effective. However, research suggests they may be associated with certain eye-related risks in some patients.

Non-arteritic anterior ischemic optic neuropathy (NAION) is a rare but serious condition that affects the optic nerve and can cause sudden, painless vision loss. While uncommon, some studies suggest NAION may occur slightly more often in people taking GLP-1 medications.

GLP-1 medications have also been associated with:

• Worsening of diabetic retinopathy
• Exacerbation of age-related macular degeneration
• Optic nerve complications, including NAION

These risks don’t mean you should stop taking your medication, but they do show why it’s important to have an eye exam before starting and regular follow-up exams while on treatment. Ongoing monitoring allows optometrists to detect changes early and take action to protect your vision.

When to Schedule an Eye Exam

Before starting GLP-1 therapy, especially if you have diabetes or age-related macular degeneration, you should have:

• A comprehensive, in-person, dilated eye exam with an optometrist within the 12 months before starting therapy, or

• A baseline comprehensive exam within one month after beginning treatment

Possible Warning Signs to Watch For

Some eye complications can develop suddenly and often affect only one eye. Contact a doctor of optometry immediately if you notice:

• Sudden, painless vision loss in one eye
• Missing or dark areas in your vision, especially in the upper or lower half
• Blurred or cloudy vision
• Changes in color vision, such as colors appearing faded or washed out

Some changes in the eye, such as swelling of the optic nerve or tiny areas of bleeding, can only be detected during a dilated eye exam. If you notice any new changes in your vision, contact your doctor of optometry right away. Don’t wait for your next scheduled appointment.

Your Eyes Deserve More

GLP-1 medications can play an important role in managing chronic conditions like diabetes and obesity. Protecting your vision should be part of that overall health plan. Doctors of optometry are primary eye health care providers trained to detect, diagnose and manage eye diseases, often before you notice any symptoms.

Make comprehensive eye care part of your health routine. Find a local AOA doctor near you at https://www.aoa.org/healthy-eyes/find-a-doctor.