Contact lenses

Definition

Contact lenses are thin, curved lenses placed directly on the surface of the eyes to correct vision or for cosmetic reasons. They can create a favorable environment for microbial growth if not properly maintained.

5 Must Know Facts For Your Next Test

1. Contact lenses can harbor bacteria, fungi, and protozoa if not cleaned properly.
2. Microbial keratitis is a serious eye infection associated with improper lens hygiene.
3. Acanthamoeba is a protozoan that can cause severe infections in contact lens wearers.
4. Biofilms can form on contact lenses and their cases, promoting microbial persistence and resistance to cleaning solutions.
5. The normal microbiota of the eye includes Staphylococcus and Corynebacterium species which can be disrupted by improper lens use.

Review Questions

• What types of microbes are commonly found on improperly maintained contact lenses?
• How does Acanthamoeba affect contact lens wearers?
• Why are biofilms problematic for contact lens users?

Related terms

Microbial Keratitis: An infection of the cornea caused by bacteria, fungi, or protozoa, often linked to contact lens use.

Acanthamoeba: A genus of amoebae that can cause severe eye infections in contact lens wearers.

Biofilm: A structured community of microorganisms encapsulated within a self-produced matrix, adhering to surfaces such as contact lenses.