Why Flu Season Demands Extra Contact Lens Vigilance

Flu season isn't just a challenge for your respiratory system—it's a high-risk period for your eyes, especially if you wear contact lenses. The same viruses and bacteria that cause coughs, fevers, and sore throats can easily find their way onto your lenses and into your eyes. During winter months, people spend more time in indoor environments where airborne pathogens concentrate, and dry heated air can make eyes more susceptible to irritation and infection. According to the Centers for Disease Control and Prevention, contact lens wearers are at a sixfold increased risk of developing a corneal infection compared to those who wear glasses exclusively, and that risk climbs dramatically during cold and flu season when hand hygiene often lapses.

An eye infection can derail your week, compromise your vision, and in rare cases lead to permanent damage. The good news is that simple, consistent habits can keep your eyes healthy without forcing you to abandon your lenses entirely. This guide expands on the essential practices and adds targeted strategies to help you navigate flu season safely.

Mastering Hand Hygiene: The First and Last Line of Defense

Thorough hand washing is the most effective step you can take to protect your eyes. During flu season, your hands almost certainly encounter influenza viruses, rhinoviruses, and bacteria such as Staphylococcus aureus multiple times a day. When you handle your lenses, those pathogens can migrate directly to your cornea, where they thrive in the warm, moist environment under the lens.

The proper hand-washing technique matters. Use soap and warm water, scrub for at least 20 seconds, and pay attention to the backs of your hands, between your fingers, and under your nails. Dry your hands completely with a lint-free towel—paper towels can leave fibers that stick to lenses. Never substitute hand sanitizer for soap and water when handling lenses; sanitizers don't remove debris and can leave a chemical residue that irritates your eyes.

Make hand washing a non-negotiable ritual before every lens insertion and removal. If you've touched a phone, a keyboard, a doorknob, or any shared surface in the meantime, wash again. This single habit reduces your infection risk by an estimated 80 percent. For an extra safety net, consider using a fresh pair of disposable gloves each time you handle lenses during peak flu weeks—a common practice among healthcare professionals who wear contacts.

Proper Cleaning and Disinfection: Two Steps, Not One

Many contact lens wearers think that soaking lenses in solution overnight is enough. It's not. Cleaning and disinfection are separate, equally important processes. Cleaning removes surface deposits, biofilm, and microbes through mechanical rubbing. Disinfection kills remaining pathogens with antimicrobial agents in the solution.

Here's the correct routine for reusable lenses:

  • Wash and dry your hands thoroughly.
  • Remove one lens and place it in the palm of your hand.
  • Apply several drops of fresh multipurpose solution (never reuse or top off).
  • Gently rub the lens with your index finger for at least 20 seconds per side.
  • Rinse the lens thoroughly with fresh solution before placing it in the case.
  • Repeat for the other lens, then fill the case compartments with fresh solution and close tightly.

Never use tap water, saline solution, or rewetting drops for disinfection. Tap water contains Acanthamoeba, a microscopic organism that can cause a devastating corneal infection that is difficult to treat. Saline and rewetting drops lack the preservatives or oxidizing agents needed to kill bacteria and viruses.

Hydrogen peroxide-based systems (such as Clear Care) offer a preservative-free alternative with exceptional disinfection power. However, you must follow the neutralization time (minimum six hours) and never put hydrogen peroxide directly into your eyes. The CDC advises rubbing and rinsing your lenses even if your solution claims it is "no-rub"—the mechanical rubbing step significantly lowers the microbial load.

Consider switching to daily disposable lenses for the duration of flu season. They eliminate the need for cleaning, reduce handling, and give you a sterile pair each day. Many eye care professionals recommend daily disposables as the safest option when your immune system is under stress.

Lens Case Hygiene: The Hidden Reservoir of Contamination

Your contact lens case can be dirtier than your toilet seat if not properly maintained. Bacteria and fungi thrive in the moist, dark environment of a lens case, and if you don't clean it regularly, you're essentially soaking your lenses in a broth of pathogens.

Daily cleaning: After inserting your lenses, empty the case, rinse each compartment with fresh solution (never water), and leave the case open to air dry upside down on a clean tissue. Store it in a clean, dry place—never in the bathroom, where humidity and airborne particles are high. A 2020 study in the journal Optometry and Vision Science found that cases stored in bathrooms had five times more bacterial contamination than those kept in a bedroom or desk drawer.

Weekly deep cleaning: Once a week, boil a heat-resistant plastic case in water for five minutes (check the manufacturer's instructions first). Alternatively, use a UV-C sanitizing device designed for lens cases. Allow the case to cool completely before refilling.

Replacement schedule: Replace your lens case every three months at a minimum. During flu season, consider replacing it every month. Throw it away immediately if you notice any cracks, cloudiness, or a slimy biofilm. Never share your case with anyone—not even a spouse or sibling—since this directly transfers bacteria between users.

Adhering to Replacement Schedules: No Exceptions

Contact lenses accumulate protein deposits, lipids, and microscopic scratches over time. These imperfections create hiding spots for bacteria and viruses, and worn-out lenses also adhere more tightly to the cornea, increasing the risk of micro-abrasions. Once the corneal surface is compromised, pathogens can more easily penetrate and cause infection.

Follow the replacement schedule your eye doctor prescribed. Disposable daily lenses are for single use only—throwing them away after one day of wear is non-negotiable. Biweekly lenses should be discarded every two weeks, monthly lenses every 30 days. Wearing lenses beyond their intended life is one of the most common factors in contact lens–related infections, especially during flu season when your body's immune defenses are already strained.

If you experience any discomfort, redness, blurred vision, or unusual tearing, remove the lenses immediately and do not reinsert them. Switch to glasses for the rest of the day and inspect the lenses for damage. The American Academy of Ophthalmology warns that sleeping in contact lenses—even those labeled for extended wear—dramatically increases infection risk. When you're sick, your body temperature rises slightly, which can change the fit of the lens and further compromise oxygen flow to the cornea. Never sleep in your lenses unless specifically directed by your eye doctor.

Additional Precautions for Flu Season: Beyond the Basics

Optimize Indoor Air Quality

Dry winter air—whether from heating systems, space heaters, or fireplaces—can cause your tears to evaporate faster, leading to dry eyes. Dry eyes are more prone to irritation and infection because the natural tear film acts as a protective barrier. Use a humidifier in your bedroom and workspace to maintain indoor humidity between 40 and 60 percent. Blink more frequently when reading or looking at screens; many of us blink only half as often when focused. Artificial tears (preservative-free, single-use vials) can supplement moisture throughout the day, but apply them before inserting lenses or wait 15 minutes after removal to avoid trapping bacteria against the eye.

Support Your Immune System

Your eyes are part of your body's immune system. When you're run down, your eye's natural defenses weaken. Prioritize sleep, stay hydrated, and eat a diet rich in vitamins A, C, and zinc—nutrients that support immune function and eye health. Leafy greens, citrus fruits, nuts, and lean proteins all contribute. If you're taking any cold or flu medications, be aware that antihistamines and decongestants can dry out your eyes and increase lens discomfort. Stay hydrated and consider using lubricating drops approved for contact lens wear.

Reduce Lens Wearing Time

If you typically wear your lenses for 12–14 hours, cut back to 8–10 hours during flu season. Give your eyes more time to breathe and recover each day. If you work in a high-exposure environment like a hospital, daycare, or school, strongly consider wearing glasses full-time for the duration of flu season. Your eyes will thank you, and you'll reduce the chance of introducing viral particles into your eyes through lens handling.

Disinfect High-Touch Surfaces

Phones, keyboards, remote controls, and light switches are reservoirs for respiratory viruses. Wash your hands immediately after using these items—and before touching your face, especially your eyes. Many people unconsciously touch their eyes dozens of times a day. The World Health Organization advises contact lens wearers to avoid touching their eyes, nose, and mouth as much as possible during infectious disease outbreaks. If you must rub an itchy eye, use a clean tissue or the back of your wrist, not your fingers.

Replace Your Solution and Accessories Regularly

Multipurpose solutions lose their effectiveness after opening. Mark the date you open a bottle and replace it every 90 days—or sooner if it changes color, develops sediment, or smells off. Use only the solution that matches your lens material; not all solutions are compatible with all lenses. Keep your solution bottle away from heat and direct sunlight. Never transfer solution to a different bottle or mix two different types of solution.

Early recognition of an eye infection can save your sight. During flu season, symptoms of a viral eye infection can overlap with general flu symptoms—redness, tearing, sensitivity to light—so it's easy to dismiss them. Stay alert for the following signs:

  • Redness that persists or worsens after you remove your lenses
  • Pain or discomfort that isn't just mild dryness
  • Blurred vision that doesn't clear with blinking or after lens removal
  • Unusual discharge: watery, thick, pus-like, or crusting along the lash line
  • Increased sensitivity to light (photophobia)
  • A feeling that something is in your eye (foreign body sensation)
  • Swelling of the eyelids

If you experience any combination of these, remove your lenses immediately and do not reinsert them. Place them in a clean case—don't dispose of them—in case your eye doctor needs to test them. Do not attempt to self-medicate with over-the-counter eye drops; some drops can worsen certain infections. Seek professional medical attention from an eye care provider right away. The FDA warns that contact lens–related infections can progress rapidly—what starts as mild redness can become a corneal ulcer requiring intensive treatment within 24 hours. Do not wait to see if symptoms go away on their own.

If you wear reusable lenses and suspect an infection, throw away the current pair, clean and disinfect the case thoroughly (or replace it), and use a fresh pair of lenses only after your eye doctor has confirmed it's safe to return to contact wear. In the meantime, rely on your glasses.

Making the Temporary Switch to Glasses

If you find yourself rubbing your eyes frequently, dealing with symptoms of dryness, or simply feeling run down, consider making glasses your primary vision correction for the remainder of flu season. This eliminates the daily handling of lenses and gives your corneas a rest from the physical barrier of the lens—a break that promotes oxygen exchange and natural repair.

For those in healthcare, childcare, or other front-line roles, this switch is especially wise. Not only does it reduce the chance of transferring pathogens from your hands to your eyes, but it also avoids the risk of introducing the flu virus directly to your eye's surface from an infected patient or surface. Your eye doctor can help you update your glasses prescription to match the visual acuity you're used to with contacts—often a small adjustment is needed to maintain the same clarity.

If you hate the thought of wearing glasses full time, try a compromise: wear glasses for the first half of your day (when viral loads are often highest in public places) and switch to lenses for the evening when you're at home. Every hour your eyes spend without covers reduces their infection risk.

Conclusion: Small Habits, Big Protection

Flu season doesn't have to mean giving up contact lenses entirely—but it does demand a higher level of discipline. By washing your hands thoroughly and consistently, cleaning and disinfecting your lenses properly, caring for your lens case, and honoring replacement schedules, you eliminate the vast majority of infection risks. Adding seasonal safeguards like humidifiers, reduced wear time, and temporary glasses when you're sick or in high-exposure environments further protects your eyes. The key is to make these behaviors automatic, not optional.

Your eyes are irreplaceable. Every time you handle your lenses, you are either protecting them or putting them at risk. Choose protection. Your future self—with clear vision and healthy eyes—will thank you.