A slack everted lid margin, usually with a large palpebral fissure, is a common conformational fault in a number of dog breeds, but contracting scars in the lid and facial nerve paralysis may produce unilateral ectropion in any species. The resultant conjunctival exposure results in chronic or recurrent conjunctivitis from environmental irritants and bacterial infection. Topical antibiotic-corticosteroid preparations temporarily control the periodic infections, but surgical correction is indicated in many instances. Mild cases can be controlled by periodic lavage with mild decongestant solutions.