Inclusion Criteria:  Age 18 or older. Anterior or mixed (anterior + posterior) blepharitis. Similar clinical condition of both eyes.  Exclusion Criteria:  Any ocular surface disease other than blepharitis. Known allergy to iodine. Eye surgery in the last 6 months. Ocular trauma in the last 6 months. Use of contact lenses in the last 6 months. Pregnancy or lactation. Daily use of makeup on lashes. Any ocular or systemic medication that might affect the ocular microbiota (antibiotics, immunosuppressants, steroids).