Updated: January 21, 2026
Improper contact lens care can lead to eye irritation, inflammation, and serious infections such as keratitis and corneal ulcers. Poor hygiene, overwearing lenses, using water, or reusing old solution can trap germs against the eye and damage the corneal surface. Some complications can develop quickly and may threaten vision, so recognizing warning signs and improving care habits is important.
Common Complications:
- Irritation and dry eye symptoms, including burning, scratchiness, and blurry vision from deposits, poor cleaning, or long wear time.
- Conjunctivitis (pink eye) or contact lens-related inflammation, which can cause redness, tearing, and discomfort.
- Keratitis (corneal infection or inflammation), which may cause pain, light sensitivity, discharge, and reduced vision.
- Corneal ulcers or scarring, which can permanently affect vision if not treated promptly.
- Red flags that need urgent care include severe pain, increasing redness, light sensitivity, discharge, or sudden blurry vision.
Consistent hygiene, correct cleaning solution, and following wear schedules are key to preventing many contact lens-related complications.
Disclaimer: This information is for general informational purposes only and is not a substitute for professional advice, diagnosis, or treatment.
References:
Preventing Eye Infections When Wearing Contacts. Centers for Disease Control and Prevention (CDC). https://www.cdc.gov/contact-lenses/prevention/index.html. Updated May 27, 2025.
Corneal Infections Associated with Sleeping in Contact Lenses — Six Cases, United States, 2016–2018. CDC Morbidity and Mortality Weekly Report (MMWR). https://www.cdc.gov/mmwr/volumes/67/wr/mm6732a2.htm. Published August 17, 2018.
Contact Lens Risks. U.S. Food and Drug Administration (FDA). https://www.fda.gov/medical-devices/contact-lenses/contact-lens-risks. September 4, 2018.
