Can I have laser eye surgery if I am diabetic?

Diabetes is no longer an automatic barrier to laser eye surgery, but it does change how we assess suitability. Whether LASIK, SMILE or LASEK is right for you depends less on the diagnosis itself and more on how well your diabetes is controlled, how long you have had it, and whether it has affected your eyes.

Blood sugar control is the first thing we check

Stable blood sugar is essential before any refractive procedure. Fluctuating glucose levels can cause temporary changes in your glasses prescription, which means the measurements taken before surgery may not match your eye on the day of treatment. We usually look for a stable HbA1c and well-controlled daily glucose readings before planning laser surgery.

If your diabetes is newly diagnosed or poorly controlled, we will typically recommend getting it stable first. Operating while glucose levels are swinging can lead to an unpredictable result and a higher chance of needing an enhancement later.

Your retinas must be healthy

Diabetes can affect the blood vessels at the back of the eye, causing diabetic retinopathy. Even background diabetic retinopathy — the earliest stage — can be a reason to delay or avoid laser eye surgery. Laser reshapes the cornea at the front of the eye; it does not treat diabetic damage at the back, and we need to be sure the retina is stable before considering any elective eye procedure.

A detailed dilated retinal examination, sometimes with OCT imaging, is a standard part of the assessment for any patient with diabetes. If retinopathy is present, we will usually refer you for monitoring or treatment by a retinal specialist before discussing laser vision correction.

Type and duration of diabetes matter

People with long-standing type 1 diabetes, or diabetes diagnosed many years ago, are more likely to have subtle corneal nerve changes or dry eye. These can affect both the accuracy of measurements and the speed of healing after laser surgery. That does not mean laser surgery is impossible, but it means the assessment and aftercare need to be more thorough.

The risks are slightly higher

Compared with patients without diabetes, people with diabetes have a slightly higher risk of slow healing, infection, dry eye and inflammation after laser eye surgery. Corneal nerves are altered by the laser, and diabetic corneas can take longer to recover sensation. For this reason, some surgeons prefer surface treatments such as LASEK or TransPRK over flap-based LASIK in certain diabetic patients.

Alternatives if laser surgery is not suitable

If laser eye surgery is not recommended, you are not out of options. Implantable collamer lenses (ICLs), refractive lens exchange and premium cataract surgery can all be excellent alternatives in selected patients with diabetes. These avoid altering the cornea and may be a safer route depending on the health of your eye.

What happens at the assessment

A diabetic patient assessment includes more than a standard laser screening. We check your latest HbA1c, review your medication, examine the retina carefully, measure corneal thickness and shape, assess tear film, and look for any signs of diabetic corneal neuropathy. We also discuss how your daily glucose control might affect measurements and timing.

Aftercare is especially important

After laser eye surgery, diabetic patients need close follow-up. Drops are used for longer, and we monitor for signs of delayed healing, inflammation or infection more carefully. Keeping blood sugar well controlled during the healing period is one of the best things you can do to protect your result.

Next steps

If you have diabetes and are interested in laser eye surgery, book a comprehensive refractive assessment. Bring your latest HbA1c result and a list of your medications. We will examine the front and back of your eyes, discuss whether laser surgery is suitable for you, and explain the alternatives if it is not.