Blepharitis is the inflammation of the eyelids. In some cases the eyelids can become extremely swollen, itchy, and/or covered with purulent discharge.
Clinical signs of blepharitis
The eyelids are usually quite swollen and thickened. Most have a purulent discharge, which often looks like the discharge associated with dry eye.
Wipe all the discharge away and do a Schirmer Tear Test. The STT is usually increased above normal. The conjunctiva is hyperaemic. Most affected dogs rub at their eyelids.
Less commonly, you may see blepharospasm and corneal ulceration.