Contact lenses offer convenience for vision correction, but using them beyond their recommended lifespan can lead to various eye problems, including headaches.
Reasons for Headaches
Headaches from old contact lenses often stem from several physiological and mechanical issues within the eye. One primary cause is reduced oxygen flow, or hypoxia, to the cornea. The cornea receives most of its oxygen directly from the air and tears. A contact lens acts as a barrier, and as it ages, its material can become less permeable, depriving the cornea of adequate oxygen. This oxygen deprivation can lead to corneal swelling and discomfort, which may manifest as a headache.
Another contributing factor is the buildup of deposits on the lens surface. Over time, debris from tears can accumulate on the lens. These deposits can cause irritation to the eye, leading to blurred vision and eye strain as the eye attempts to compensate for the reduced clarity. This constant strain on the eye muscles can then trigger headaches.
Lens degradation and fit issues also play a role. The material of a contact lens can change over its intended wear period, altering its shape or flexibility. An improperly fitting lens can cause friction against the eye, leading to ongoing irritation and discomfort. Furthermore, old lenses may increase the risk of infection and inflammation. Compromised hygiene or material breakdown can create a breeding ground for infection, which can cause significant eye pain and referred headaches.
Associated Eye Issues
Beyond headaches, wearing old or improperly maintained contact lenses can lead to a range of other significant eye problems. The eye may experience general strain and fatigue as it struggles to focus through a compromised lens. Chronic inflammation or allergic reactions can also occur due to deposits or changes in the lens material, often resulting in redness and irritation.
Old lenses can exacerbate dry eyes or cause new instances of dryness. This can happen because of reduced breathability of the lens material or interactions with contact lens solutions, leading to discomfort and a gritty sensation. The clarity of vision can also directly suffer from compromised lens integrity or fit, causing blurred vision.
More serious complications include severe infections. These conditions can arise from prolonged or improper use, and if left untreated, they can lead to vision-threatening outcomes. Physical damage to the cornea also poses a risk from ill-fitting or contaminated lenses.
Maintaining Eye Health with Contacts
To prevent issues like headaches and other eye problems associated with contact lens use, adhering to replacement schedules is important. Lenses should be replaced exactly as prescribed. This practice minimizes the accumulation of deposits and ensures the lens material remains safe for wear.
Proper cleaning and storage are also essential. Always wash hands thoroughly with soap and water before handling lenses. Use only recommended solutions for cleaning and disinfection, and never reuse or “top off” old solution in the lens case. The lens case itself should be rinsed with fresh solution, air-dried, and replaced at least every three months.
Avoid wearing lenses longer than recommended or sleeping in them unless specifically approved by an eye care professional for extended wear. Regular eye exams with an optometrist or ophthalmologist are also necessary, once a year, to monitor eye health, check lens fit, and update prescriptions. If persistent pain, redness, blurred vision, or light sensitivity occurs, remove lenses immediately and seek professional medical attention.