The present invention relates to a method for treating a disorder chosen from ocular Demodex, Demodex-induced blepharitis, rosacea, acne, and meibomian gland dysfunction in a patient in need thereof, comprising administering to the patient a compositions comprising a therapeutically effective amount of a substance chosen from at least one of an isoprenoidal essential oil such as Tea Tree Oil Terpinen-4-ol (+)-Carvone alpha-Terpineol Cardinene d-Carvone 1-Carvone gamma-Terpinene alpha-Terpinene 1,8-Cineole alpha-Terpineol para-Ci mene alpha-Pinene Limonene (R)-(+)-Limonene alpha-Thugene Eucalyptol (+)-Ledene Cuminic Aldehyde and Myrcene the administration comprising contacting or scrubbing an affected area of skin or hair, or eyelid margin and lashes of the patient with the composition also disclosed are a method for treating mange and mite infestations on a mammalian animal and kits for in-office and at home treatments of the disorders.
