Where does an eye mite live? - briefly
Eye mites reside in the hair follicles and sebaceous glands of the eyelids, especially along the lash line. They are microscopic parasites that live on the skin surface surrounding the eye.
Where does an eye mite live? - in detail
Eye mites, specifically Demodex species, inhabit the human ocular region as permanent ectoparasites. They reside primarily in the hair follicles and sebaceous glands surrounding the eyelid margins. The microscopic organisms embed themselves in the meibomian glands, which produce the oily component of the tear film, and in the lash follicles where they feed on cellular debris, secretions, and microorganisms.
Key micro‑environments include:
- Lash follicles – protected niche offering shelter and a constant supply of keratinous material.
- Meibomian (tarsal) glands – lipid‑rich environment that supplies nutrients and a stable temperature.
- Conjunctival surface – occasional presence, especially when populations increase, leading to irritation.
Population density varies among individuals. Healthy eyes typically host a low number of mites, often undetectable without microscopic examination. Factors that influence colonization are:
- Sebum production – higher lipid output creates a favorable habitat.
- Age – prevalence rises after adolescence, peaking in middle age.
- Immune status – compromised ocular immunity can allow mite numbers to expand.
When the balance shifts toward overpopulation, symptoms such as itching, burning, and a gritty sensation may develop, indicating a need for targeted treatment.