Chronic bacterial conjunctivitis generally does not cause blindness. Its main clinical symptoms include itching, burning, dryness, eye pain, and visual fatigue. The conjunctiva is mildly congested and may be accompanied by thickening of the palpebral conjunctiva, papillary hypertrophy, and mucous secretions. Moraxella can cause canthal conjunctivitis, which is accompanied by crusting and ulceration of the skin at the outer canthus, and hypertrophy of the palpebral conjunctiva's papillae and follicles. Staphylococcus aureus infections are often accompanied by ulcerative blepharitis, or peripheral corneal punctate infiltration.