Contact lenses are one of the safest and most effective vision correction options available when they are used correctly. The problems arise from shortcuts that seem harmless and accumulate risk over time. Contact lens related eye infections are among the most preventable causes of vision loss seen in optometry clinics, and the majority trace back to a small number of common habits that most lens wearers do not realize are putting their eyes at risk.
This is not a lecture. It is a practical guide to what actually protects your eyes as a contact lens wearer in Edmonton, and what quietly puts them in danger.
Habits That Protect Your Eyes
Replacing your lenses on schedule is the foundation of safe contact lens wear. Daily lenses are designed to be worn once. Monthly lenses are designed for 30 days of daily wear with nightly cleaning. Wearing lenses past their replacement schedule allows protein and lipid deposits to build up on the lens surface, reducing oxygen transmission and creating a surface where bacteria adhere far more easily. The extra wear you get out of an expired pair of monthly lenses is not worth what you are risking.
Washing your hands thoroughly before handling lenses is the single most effective prevention measure for contact lens infections. Use soap and water, rinse well, and dry with a clean lint-free towel before inserting or removing lenses. This step takes thirty seconds and eliminates the most common route for bacteria to reach the eye.
Using fresh lens solution every single time means discarding the solution from the case after each use, rinsing the case with fresh solution, and refilling it completely. Topping off old solution dilutes the disinfecting agent and allows microorganism growth. It is one of the most common habits among long-term contact lens wearers and one of the most quietly dangerous ones.
Replacing your lens case at least every three months matters more than most people realize. Lens cases are a primary source of contamination. After every use, rub the case with fresh solution, rinse it, and air dry it face down on a clean tissue. A case that looks clean can still harbor a biofilm of organisms that solution alone does not eliminate.
Removing lenses before any contact with water is essential. Water, including tap water, swimming pools, hot tubs, lakes, and rivers, can carry Acanthamoeba, a microorganism that causes a severe, painful, and notoriously difficult to treat corneal infection in contact lens wearers. The infection is rare, but when it occurs it is serious. Edmonton’s lakes and rivers are particularly relevant in summer. Remove lenses before swimming.
Attending your annual contact lens exam in Edmonton gives your optometrist the chance to check your corneal health, tear film, and lens fit. Wearing contact lenses changes the corneal surface over time, and regular monitoring catches any issues before they become complications.
Habits That Put Your Eyes at Risk
Sleeping in contact lenses, unless specifically prescribed for overnight wear, reduces corneal oxygen supply significantly. The cornea relies on atmospheric oxygen during waking hours. Overnight deprivation creates conditions that favor bacterial and fungal growth. Extended wear lenses exist and are safe under proper optometrist guidance, but wearing standard daily or monthly lenses overnight repeatedly is a genuine risk factor for serious infection.
Rinsing lenses or lens cases with tap water is one of the habits most strongly associated with Acanthamoeba keratitis. Tap water is not sterile. It can contain organisms that standard contact lens disinfecting solutions are not reliably effective against. Use only contact lens solution for anything that touches your lenses or case.
Continuing to wear lenses when your eyes are red or irritated is a mistake that worsens whatever is already happening. Redness, discharge, or pain while wearing contact lenses is a signal to remove them immediately and call your optometrist. Wearing lenses over an irritated or early-infected eye dramatically accelerates the problem. If you have symptoms that do not resolve after removing the lenses, see your optometrist the same day. If you experience sudden significant pain, light sensitivity, or vision change, this warrants urgent eye care in Edmonton.
Wearing someone else’s contact lenses, even for a moment to try them, introduces infection risk and provides no reliable vision correction. Contact lenses are prescription medical devices fitted specifically to the curvature and prescription of your eye.
Questions Edmonton Contact Lens Wearers Ask About Safety
Q: How do I know if my contact lens is causing an eye infection?
Signs of a contact lens related infection include redness that does not improve after removing the lens, pain or discomfort that persists after removal, increased light sensitivity, blurry vision in the affected eye, and discharge. If you experience any of these, remove your lenses immediately and contact Eyes On Optometry for an urgent appointment. Do not put the lenses back in until you have been assessed.
Q: I wear daily lenses. Can I sleep in them just once?
The short answer is that it is not worth it. Even a single overnight wear significantly increases the risk of hypoxia related changes and microbial adhesion to the lens surface. Daily lenses in particular are not manufactured with the oxygen permeability needed for safe overnight use. If you fall asleep in your lenses occasionally, remove them as soon as you wake up and give your eyes lens-free time during the day.
Q: Can I shower with my contact lenses in?
It is not recommended. Shower water carries the same microorganism risks as other water sources. The risk is lower than swimming in a lake, but it is not zero. The safest practice is to remove lenses before any contact with water and put them back in after you have dried your face and hands.
Q: My eyes feel dry by the end of the day with contacts. Is that normal?
End-of-day dryness is common but is not something you have to accept as inevitable. It is often a sign that your lens type, wearing schedule, or dry eye management needs adjustment. Read our post on dry eye and contact lenses in Edmonton for a detailed breakdown of what actually helps. A contact lens exam that evaluates your tear film alongside your lens fit will identify what change would make the biggest difference.
Q: How long can I really wear monthly lenses before replacing them?
30 days of daily wear as directed. Not 35. Not until the next payday. The replacement schedule exists because the lens material degrades, deposits accumulate, and oxygen transmission decreases over time. Wearing them longer than directed is a risk that is not proportionate to the small cost saving involved.
Book Your Annual Contact Lens Exam in Edmonton
Eyes On Optometry provides annual contact lens assessments as part of our comprehensive eye care services. If you have not had a lens exam in over a year, or if you have been experiencing any discomfort, dryness, or changes in lens tolerance, contact us to book your appointment in Edmonton.