Of course, conjunctivitis is different from blepharitis. Conjunctivitis is an inflammation of the outer layer of the eye and the inner surface of the eyelid. It is most commonly caused by infection from viruses or bacteria, allergies, other irritants such as overexposure to sun, wind, smog or contact lens solution. However, blepharitis is a chronic inflammation of the eyelid and it is caused by a bacterial infection. Furthermore, those who suffer conjunctivitis manifest such symptoms such as red eyes, swelling of conjunctiva and watering of the eyes while symptoms that are associated with the blepharitis are itching, irritation and burning sensation, redness of the eyelids, flaking of skin on the lids, crusting at the lid margins, cysts at the lid margin, red eye, gritty sensation of the eye and reduced vision.