Contact Lenses and Diabetes
How Diabetes Affects Contact Lens Wear
When your blood sugar levels go up or down, the shape of your eye's lens can temporarily change. This can make your vision blurry even if your contact lens prescription is correct. You might notice that your contacts feel perfect one day and off the next, especially if your glucose levels are not stable.
We recommend getting your diabetes well controlled before we finalize your contact lens prescription. Once your blood sugar is more consistent, your vision will stabilize and we can find the right lens power for you. Glycemic shifts can also change corneal hydration and curvature, which affects both vision and lens fit.
Diabetes can weaken your immune system, making it harder for your body to fight off bacteria and other germs. This means you face a greater risk of developing eye infections when wearing contact lenses compared to people without diabetes.
Infections can develop quickly and become serious if not treated promptly. That is why strict hygiene and proper lens care are especially important for you.
Many people with diabetes experience dry eyes because the disease can affect the glands that produce tears. Contact lenses rely on a healthy tear film to stay comfortable and move properly on your eye.
- Your tears may evaporate faster than normal
- You may produce fewer tears overall
- The quality of your tears may be poor, lacking the right balance of oil and water
- Lenses can feel gritty or uncomfortable after just a few hours
Diabetes can slow down the healing process throughout your body, including on the surface of your cornea. Even a tiny scratch or irritation from a contact lens can take longer to heal if you have diabetes.
Slow healing increases the chance that a minor problem will turn into a more serious infection or ulcer. We will monitor your cornea closely to catch any issues early.
Diabetic retinopathy is damage to the blood vessels in the back of your eye caused by high blood sugar over time. If you have this condition, we need to evaluate whether contact lenses are still the best choice for you. Active proliferative retinopathy, diabetic macular edema, or recent intravitreal injections may prompt us to defer or limit contact lens wear.
While diabetic retinopathy itself does not prevent contact lens wear, it does mean you need more frequent eye exams. We may recommend glasses instead if your retinopathy is advanced or if you have trouble keeping up with lens care and follow-up visits.
Warning Signs and Complications to Watch For
A little redness when you first put in your lenses can be normal, but it should go away quickly. If your eyes stay red or become redder throughout the day, something is wrong.
- Remove your lenses immediately if redness develops
- Do not put them back in until we have examined you
- Persistent redness can signal infection or inflammation
- Diabetic patients can develop complications faster than others
Sudden changes in vision clarity are most often linked to blood sugar fluctuations, corneal or tear film changes, or a problem with the contact lens, such as deposits or a poor fit. Diabetic macular edema typically develops more gradually but still needs prompt assessment.
Do not assume blurry vision is just a need for a new prescription. Contact us right away so we can determine the cause and protect your sight.
Sudden vision loss, new flashes, or a shower of floaters require same-day evaluation.
Contact lenses should never hurt. If you feel pain, a burning feeling, or the sensation that something is stuck in your eye, take your lenses out immediately.
These symptoms can mean you have scratched your cornea, developed an infection, or that your lens has a defect. Diabetic patients should never try to push through discomfort, as small problems can escalate quickly.
Unusual discharge from your eyes, especially if it is yellow, green, or thick, is a red flag for infection. You may also notice crusting on your eyelids when you wake up or tears that stream down your face when you are not crying.
- Stop wearing your contact lenses right away
- Discard your current lenses, lens case, and any open solution bottles, and do not resume lens wear until you are cleared by the eye doctor
- Call our office for an urgent appointment
- Bring your lenses and case with you if possible
If bright lights suddenly bother you more than usual or you see halos, floaters, or flashes of light, these can be serious warning signs. Light sensitivity combined with redness and pain can indicate a corneal infection or ulcer.
Visual disturbances can also signal problems with diabetic retinopathy or other conditions in the back of your eye. We need to see you urgently to rule out vision-threatening complications. Flashes and floaters can indicate a retinal tear or detachment and require same-day dilated examination.
Evaluation and Fitting Process for Diabetic Patients
Your contact lens exam will be more thorough than a standard fitting because of your diabetes. We will spend extra time evaluating the health of your cornea, tear film, and retina before determining whether contacts are right for you.
- We will ask detailed questions about your diabetes management
- You will undergo specialized imaging of your cornea
- We will assess your tear quantity and quality
- The exam may take longer than for non-diabetic patients
We may ask about your recent blood sugar readings and your HbA1c level, which shows your average blood sugar control over the past few months. HbA1c is a lab test that reflects your average blood sugar over about 3 months. If your diabetes is poorly controlled, we might suggest waiting to fit you for contacts until your numbers improve.
Better blood sugar control means more stable vision, healthier eyes, and better success with contact lenses. We want to set you up for success from the start. If you have recently started or changed diabetes medications, wait 1 to 2 weeks after your glucose stabilizes before finalizing a new contact lens prescription.
We use special instruments to examine the surface of your cornea in detail. This helps us detect any early signs of damage, thinning, or poor healing that diabetes might cause.
The imaging is painless and quick, and it gives us a baseline to compare against at future visits. If we spot any concerns, we can adjust our lens recommendations or treatment plan accordingly.
- Corneal topography and pachymetry
- Corneal sensitivity
- Ocular surface staining and tear breakup time
- Tear osmolarity or MMP-9 testing
- Meibomian gland function
People with diabetes can have reduced corneal sensation, so we do not rely on pain alone to judge safety.
Not all contact lenses are created equal. For diabetic patients, we often recommend lenses made from materials that allow more oxygen to reach your cornea and that resist deposits.
- Silicone hydrogel lenses provide excellent oxygen flow
- Daily disposable lenses reduce infection risk
- Some lens designs work better with dry eyes
- We will select the safest and most comfortable option for your specific needs
- Daily disposables are usually preferred for diabetes because they reduce contamination risk, but no lens type eliminates risk
- Avoid extended wear approvals; prescribe daily wear schedules only
- Rigid gas permeable or scleral lenses can help in select cases of dry eye or irregular corneas, but they require strict hygiene and close follow-up
We typically start you with trial lenses to make sure they fit well and feel comfortable before you invest in a full supply. During this period, you will return for several follow-up visits so we can check how your eyes are responding.
Adjustments to lens type, fit, or wearing schedule are common and expected. Be patient with the process, and let us know about any discomfort or vision changes right away.
Best Practices for Safe Contact Lens Use
Always wash your hands thoroughly with soap and water before touching your contact lenses or your eyes. Dry them with a clean, lint-free towel.
- Use plain, non-moisturizing soap; avoid antibacterial or heavily scented soaps that can leave residue
- Scrub for at least 20 seconds
- Avoid scented or oily hand lotions before handling lenses
- Never use saliva or tap water on your lenses
Do not sleep or nap in contact lenses. Sleeping in lenses greatly increases the risk of serious eye infection, especially if you have diabetes.
- Never wear lenses while swimming, using a hot tub, or showering
- If your lenses come into contact with water, remove them as soon as possible
- For daily disposables, discard the lenses and use a fresh pair
- For reusable lenses, clean and disinfect before reinsertion and monitor closely for any symptoms
If you wear reusable lenses, you must clean and disinfect them every single night. Use only fresh contact lens solution recommended by our eye doctor, and never top off old solution in your case.
Rub and rinse your lenses even if your solution is labeled as a no-rub formula. This mechanical cleaning removes protein deposits and bacteria that can harm your eyes, especially given your higher infection risk. Never use homemade saline, tap water, or saliva on your lenses or in your case.
- Empty and rinse the case with fresh disinfecting solution after each use, then wipe and air-dry facedown with caps off
- Replace your lens case every 1 to 3 months
- Never top off solution or transfer solution into travel containers
- Saline does not disinfect lenses
- Hydrogen peroxide systems require full neutralization before lenses touch your eyes; never instill unneutralized peroxide
Do not stretch your lens replacement schedule. If your lenses are designed to be replaced every two weeks, change them every two weeks without exception.
Old lenses accumulate deposits, lose oxygen permeability, and become more likely to cause infections or corneal damage. Diabetic patients cannot afford to cut corners on lens hygiene and replacement. Choose daily wear schedules only and avoid any extended or overnight wear.
Because dry eyes are common with diabetes, you may need rewetting drops throughout the day. Use only drops that are labeled as safe for contact lenses.
- Keep a bottle of rewetting drops with you at all times
- Apply drops whenever your lenses feel dry or uncomfortable
- Use rewetting drops labeled for contact lens use; if you need drops more than 4 to 6 times daily, choose preservative-free drops labeled for contacts or remove lenses before using preservative-free lubricants
- Ask us for recommendations if you are unsure which drops to choose
- If you rely on drops frequently, schedule a dry eye evaluation to address the underlying cause
If you check your blood sugar by pricking your finger, make sure your hands are clean before handling your lenses. Always wash and dry your hands thoroughly after glucose testing and before handling lenses, regardless of which you do first.
If your blood sugar is running very high or very low, consider taking a break from your contacts until your levels stabilize. Extreme fluctuations can make lenses uncomfortable and your vision unreliable.
Managing Follow-Up Care and Knowing When to Stop
We typically recommend that diabetic contact lens wearers have eye exams more often than non-diabetic wearers. At minimum you should have a comprehensive dilated diabetic eye exam every year; every 6 months is often recommended for regular contact lens wearers, and more frequently if you have retinopathy or macular edema.
These visits allow us to monitor your corneal health, update your prescription as needed, and catch early signs of diabetic eye disease. Do not skip appointments even if your vision seems fine.
There are times when taking a break from contact lenses is the smartest choice for your eye health. If you develop a cold, sinus infection, or any eye irritation, switch to glasses until you are fully recovered.
- Remove lenses if your blood sugar is very unstable
- Take a break if your eyes feel unusually dry or irritated
- Stop wearing them if you have any redness, pain, or discharge
- Give your eyes a rest day in glasses at least once a week if possible
- After intravitreal injections or any eye surgery, avoid lenses until your eye doctor clears you
- Do not wear lenses while using prescription antibiotic or steroid eye drops
- Avoid lenses on days you swim, use hot tubs, or plan to shower shortly after insertion
Some symptoms require immediate attention and cannot wait for a regular appointment. Severe pain, sudden vision loss, intense light sensitivity, or visible white spots on your cornea are all emergencies.
If you experience any of these, remove your contact lenses, do not put them back in, and seek care right away. Diabetic patients are at higher risk for rapid progression of eye infections, so time is critical. Diabetes can reduce corneal sensitivity, so low pain does not guarantee a minor problem.
If contacts become too uncomfortable or your eyes no longer tolerate them safely, you have other options. Modern eyeglasses are lightweight, stylish, and can be customized with special coatings that reduce glare and protect your eyes.
In some cases, we may discuss refractive surgery options if you are a good candidate. We will help you find the best vision correction solution for your lifestyle and your diabetic eye health.
Frequently Asked Questions
Most people with diabetes can wear contact lenses safely if their blood sugar is reasonably well controlled and they commit to excellent lens hygiene. However, if you have advanced diabetic retinopathy, frequent infections, or very severe dry eyes, glasses may be a safer choice.
Diabetes can contribute to discomfort because of dry eyes and changes in your tear film, but many diabetic patients wear lenses comfortably with the right lens type and good rewetting drops. We will work with you to find the most comfortable option.
There are no lenses labeled specifically for diabetics, but we often select materials and replacement schedules that are safest for your situation. Daily disposable lenses and highly breathable materials are popular choices because they reduce infection risk and are easier to manage.
Fluctuating blood sugar can change the amount of fluid in your eye and the shape of your lens, making your vision and comfort vary from day to day. Keeping your glucose stable helps your contact lens fit consistently and comfortably.
No. Sleeping in contact lenses greatly increases the risk of eye infection. Diabetic patients should use daily wear schedules only and always remove lenses before sleep.
No. Water exposure increases the risk of serious infections like Acanthamoeba keratitis. Remove lenses before swimming, hot tubs, or showering.
There is no single number that guarantees safety. More important is stable, reasonable control and the ability to follow strict lens hygiene and follow-up. Your doctor will guide you.
Yes. Vision can fluctuate during rapid changes in blood sugar. It is best to wait 1 to 2 weeks after your glucose stabilizes before finalizing a new contact lens prescription.
Daily disposable lenses eliminate the need for cleaning and case care, which significantly lowers your risk of contamination and infection. Many eye doctors, including ours, prefer daily disposables for diabetic patients because they are the most hygienic option available in 2025.
Yes, being on insulin or other diabetes medications does not prevent you from wearing contact lenses. In fact, good medication management that keeps your blood sugar stable can actually make lens wear more successful and comfortable.
Getting Help for Contact Lenses and Diabetes
If you have diabetes and are interested in contact lenses, we encourage you to schedule a comprehensive eye exam with our eye doctor. We will evaluate your eye health, discuss your diabetes management, and create a personalized plan that keeps your vision clear and your eyes safe. If you think you have an eye infection or sudden vision changes, seek same-day care and do not reinsert contact lenses until cleared.