Contact lenses can make daily life easier: no foggy lenses on rainy UK mornings, no frames during sport and more freedom for people who prefer a natural look. But because contact lenses sit directly on the eye, small habits can have a big impact. A lens that is worn too long, rinsed in tap water, stored in old solution, or used without regular aftercare can increase the risk of irritation, infection and in rare cases, sight-threatening corneal problems.
This matters because contact lens wear is common in the UK. Moorfields notes that an estimated four million people in the UK wear contact lenses, while YouGov’s 2025 data shows that 2% of UK adults wear only contact lenses and 8% use both glasses and contact lenses. Safety concerns are one reason some people hesitate to try lenses, with a quarter of glasses-only wearers saying they see glasses as lower risk for infections or eye damage.
For customers exploring daily, fortnightly, monthly, extended-wear, or specialist lenses through Johnny Goggles, the goal is not just clear vision. It is comfortable, healthy, sustainable lens wear supported by proper fitting, aftercare and practical advice.
Why Contact Lens Care Is an Eye Health Issue, Not Just a Hygiene Habit
Contact lenses are medical devices, not ordinary accessories. They touch the cornea, the clear front surface of the eye, and can affect oxygen flow, tear stability, and the build-up of microbes if handled incorrectly. Most people can wear lenses safely, but poor routines create avoidable risks.
The key issue is that contact lens problems often begin with normal-looking behaviour. Someone might nap in lenses “just once,” top up yesterday’s solution, rinse a case under the tap, or keep wearing lenses when the eyes feel dry. These habits may seem harmless, but eye-care guidance consistently warns that they can increase the risk of infection and complications. The College of Optometrists says contact lens supply should include advice on care solutions, replacement schedules, warning signs, emergency removal and regular check-ups.
Mistake 1: Sleeping or Napping in Contact Lenses
Sleeping in contact lenses is one of the most common and risky mistakes. When the eyes are closed, the cornea receives less oxygen. A contact lens adds another layer, reducing oxygen and tear exchange further. This creates a better environment for bacteria and other microbes.
Moorfields warns that sleeping in contact lenses can increase infection risk and may lead to ulcers on the front of the eye because oxygen and tear flow to the cornea are reduced. Gloucester Hospitals NHS guidance also says overnight wear of soft lenses significantly increases the risk of infection and should only happen if an optometrist has specifically advised it.
Practical takeaway
Remove lenses before sleep, even for short naps. Keep a pair of glasses nearby so you are not tempted to “push through” tiredness with lenses still in.
Mistake 2: Letting Contact Lenses Touch Water
Water and contact lenses do not mix. Tap water may be safe to drink, but it is not sterile. Swimming pools, showers, hot tubs, lakes and the sea can expose lenses to microbes that may attach to the lens and sit against the cornea.
Look After Your Eyes advises wearers never to rinse lenses or lens cases in tap water and to avoid showering or swimming while wearing contact lenses. Moorfields gives the same message, advising wearers to avoid swimming, showering, baths, hot tubs, steam rooms and saunas while lenses are in.
The Acanthamoeba risk
Acanthamoeba keratitis is rare, but it can be serious and painful. UCL and Moorfields researchers found that reusable contact lens wearers were nearly four times as likely as daily disposable wearers to develop this rare sight-threatening infection, with risk factors including reusing lenses and wearing them overnight or in the shower.
Mistake 3: Reusing or Topping Up Old Solution
Contact lens solution is designed to disinfect lenses properly. But it only works as intended when used correctly. Reusing old solution or topping it up with fresh solution weakens the cleaning process because the old liquid may already contain deposits or microbes.
For reusable lenses, only use the solution recommended by your contact lens practitioner. Look After Your Eyes advises cleaning the case daily with fresh contact lens solution, allowing it to dry and replacing it as recommended.
Mistake 4: Wearing Lenses Longer Than Recommended
Daily lenses are made for one day. Fortnightly lenses are made for a set replacement cycle. Monthly lenses are not meant to be stretched beyond the advised schedule. Wearing lenses past their replacement period may increase deposits, dryness, discomfort and the chance of infection.
This mistake often happens because the lens “still feels fine.” But comfort is not a reliable safety test. A lens can carry deposits before symptoms become obvious. Moorfields advises wearers to follow the usage advice recommended by their eye-care practitioner, warning that prolonged wear can make eyes red, sore and more prone to infection.
Mistake 5: Handling Lenses Without Washing and Drying Hands
Hands transfer oils, dirt, and microbes onto lenses. The problem is not only forgetting to wash hands; it is also putting lenses in with damp hands. Water left on fingers can still contaminate the lens.
Look After Your Eyes says wearers should always wash and dry their hands before touching their eyes or contact lenses. It also notes research from the College of Optometrists suggesting that two-fifths of people do not wash their hands before handling lenses.
A safer handling routine
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Wash hands with liquid soap before touching lenses.
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Dry hands fully with a clean towel, paper towel, or air dryer.
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Handle lenses over a clean, flat surface.
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Avoid touching lenses after applying creams, perfumes or oily products.
Mistake 6: Ignoring Redness, Pain or Blurred Vision
Some wearers wait too long before asking for help. They assume redness is from tiredness, dryness, or screen time. But contact lens-related infections can worsen quickly, especially if lenses remain in the eye.
Gloucester Hospitals NHS guidance says lenses should not be worn if the eyes are red, painful or vision has become blurred. It also advises removing lenses immediately if eyes are red or sore and seeking advice if discomfort continues.
Warning signs to take seriously
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Redness that does not settle after removing lenses
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Eye pain, soreness, or a gritty feeling
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Light sensitivity
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Blurred or reduced vision
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Discharge or watering
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A feeling that something is stuck in the eye
Mistake 7: Buying Lenses Without Proper Fitting or Aftercare
A contact lens prescription is not the same as a glasses prescription. Lenses must fit the shape of the eye, move correctly and suit the wearer’s tear film, lifestyle and wearing schedule.
Look After Your Eyes explains that contact lenses must be the right prescription and shape to avoid damaging the eyes, and they should be fitted by a qualified optometrist, contact lens optician, or doctor. It also says regular check-ups are important to confirm lenses remain suitable and are not damaging the eyes.
This is where professional guidance matters. Johnny Goggles highlights access to experienced optometrists and contact lens specialists who can help customers choose suitable lenses for their eyes.
Mistake 8: Treating Daily, Fortnightly, Monthly and Specialist Lenses the Same
Different lens types require different routines. A daily disposable lens is removed and thrown away after use. A monthly reusable lens needs cleaning, disinfecting and proper storage. Specialist lenses may require more personalised care.
Johnny Goggles lists options including daily wear, fortnightly wear, monthly wear, extended wear and specialty lenses, but the right choice depends on more than convenience.
Choosing the right lens habit for your lifestyle
If you play sport, travel often, or only wear lenses occasionally, daily disposables may reduce cleaning steps. If you wear lenses regularly and choose reusable lenses, you need a consistent cleaning routine. If you have dry eyes, irregular corneas or complex prescriptions, specialist lenses may work well, but only with proper fitting and follow-up.
Mistake 9: Wearing Lenses When Your Eyes Need a Break
Contact lenses should feel comfortable, but wearing them from early morning to late night every day can sometimes trigger dryness or irritation. Screen-heavy work, air conditioning, heating, allergies and long commutes can make symptoms worse.
Look After Your Eyes advises people who experience dryness to mention it at their contact lens check-up, as an optometrist may suggest changing lens type or reducing wearing time.
A practical approach is to keep glasses available, especially for evenings, illness, travel or days when your eyes feel tired.
Mistake 10: Using Makeup or Skincare Carelessly Around Lenses
Makeup, oils, sprays and creams can get onto lenses and irritate the eye. This is especially common with waterproof eye makeup, eyeliner applied too close to the waterline and hairspray used after lenses are inserted.
Look After Your Eyes recommends inserting lenses before applying makeup and removing lenses before taking makeup off. It also suggests using water-soluble eye makeup and applying eyeliner to the outer edge of the eyelid rather than the wet part touching the eye.
How Better Contact Lens Habits Help Customers and Eye-Care Businesses
For wearers, better habits mean fewer uncomfortable days, fewer emergency appointments and more confidence using lenses. For optical businesses, good contact lens education builds trust. Customers are more likely to continue wearing lenses when they understand how to use them safely and know where to get help.
This is especially important for first-time wearers. Many people are interested in contact lenses but worry about comfort, hygiene and handling. Clear aftercare advice turns contact lenses from a risky unknown into a manageable daily routine.
Conclusion
Most contact lens problems are preventable. The biggest risks usually come from ordinary shortcuts: sleeping in lenses, exposing them to water, stretching replacement schedules, skipping hand hygiene or ignoring warning signs. Good contact lens care is not complicated, but it does require consistency.
For UK wearers, the future of contact lenses is likely to focus on more personalised fitting, better materials, improved comfort and stronger patient education. But even the best lenses still depend on safe daily habits. With professional fitting, regular aftercare and simple hygiene rules, contact lenses can remain a comfortable and healthy vision option for many people.
FAQs
Can I shower while wearing contact lenses?
No. Remove contact lenses before showering because water can expose lenses to harmful microbes and increase infection risk.
Is it safe to sleep in contact lenses?
You should not sleep in lenses unless your optometrist has specifically advised it. Sleeping in lenses increases the risk of eye infection.
Can I rinse contact lenses with tap water?
No. Use only the recommended contact lens solution. Tap water is not sterile and should not touch lenses or lens cases.
What should I do if my eye becomes red or painful?
Remove your lenses immediately. If redness, pain, blurred vision, or discomfort continues, contact an optometrist, eye clinic or urgent eye-care service.
Do I still need check-ups if my lenses feel comfortable?
Yes. Regular check-ups help confirm that your lenses still fit properly and are not affecting your eye health, even if they feel fine.