Understanding the Gravity of Contact Lens-Related Corneal Infections

Contact lens-related corneal infections are infections of the cornea (the transparent front layer of the eye) caused by bacteria, fungi, viruses, or parasites. They occur when germs enter the eye, often due to poor contact lens hygiene or overuse, and cause inflammation, redness, pain, and vision problems. The condition is also known as contact lens-related keratitis.

What causes these infections?

Corneal infections can result from:

• Poor Hygiene: Not cleaning lenses or storage cases correctly.
• Overuse: Wearing lenses for longer than recommended, especially overnight.
• Contaminated Water: Exposing lenses to water while swimming, showering, or using non-sterile solutions.
• Damaged Lenses: Scratches or deposits on lenses can harbour germs.

What are the symptoms of a corneal infection?

Symptoms may include:

• Eye pain or discomfort.
• Redness in the affected eye.
• Blurred or decreased vision.
• Sensitivity to light (photophobia).
• Excessive tearing or discharge.
• A sensation of something in the eye.

What increases the risk of infection?

• Wearing lenses overnight Increases the risk significantly, as the eye gets less oxygen during sleep.
• Using expired lenses or solutions.
• Touching lenses with unwashed hands.
• Using tap water for cleaning lenses or cases.

How is a corneal infection diagnosed?

Your eye doctor will perform:

1. Eye Examination: Using a slit lamp to inspect the cornea.
2. Corneal Scraping: A small sample from the cornea may be taken to identify the germ causing the infection.

How is it treated?

Treatment depends on the type and severity of the infection:

• Bacterial Infections: Antibiotic eye drops are the first line of treatment. Severe cases may require oral antibiotics.
• Fungal Infections: Antifungal drops or oral medications may be prescribed.
• Viral Infections: Treated with antiviral drops or oral medications.
• Acanthamoeba (Parasitic) Infections: Require specialised treatment with anti-parasitic drugs.

In severe cases, hospitalisation or surgery, such as a corneal transplant, may be necessary to prevent vision loss.

Empowering Prevention of Contact Lens-Related Infections

• Wash hands before handling lenses.
• Clean lenses with the recommended solution—not water or saliva.
• Avoid wearing lenses while swimming or showering.
• Replace lenses and storage cases as directed.
• Follow wearing schedules and avoid overnight use unless approved by your doctor.

When should I see a doctor?

Seek immediate medical attention if you experience:

• Sudden eye pain or redness.
• Blurred vision.
• Persistent discomfort.

Early diagnosis and treatment are crucial to prevent complications like permanent vision loss or the need for more invasive treatments like corneal transplants.

Reassuring Safety of Contact Lenses with Proper Use

Yes! With proper hygiene and care, contact lenses are safe and effective. Always follow your optometrist’s advice for healthy lens wear.