Blepharitis is an inflammation of the eyelids.
Symptoms:
1- Pain is manifested by blepharospasm.
2- Hyperemia and swelling of the eyelid due to edema or inflammatory cell infiltration.
3- Alopecia, Scaliness, pruritis and epiphora.
4- Serous or purulent exudation.
5- Ulceration and fibrosis especially in chronic cases.

Fig.24: Chronic blepharitis in a cat.
Treatment
1- Careful cleaning of the lid margins and removal of purulent exudates with cotton soaked with worm normal saline or 2% sodium bicarbonate solution.
2- Topical application of antibiotic ointments to the outer and inner lid margin.
3- Topical fungicide is used in cases of fungal blepharitis.
4- A protective ointment is applied to the lid in parasitic blepharitis.
1- Corticosteroids and antihistamines are indicated in cases of allergic blepharitis.