Conjunctivitis is inflammation of the transparent mucosal tissue on the eyeball, while cornea is inflammation of the black eyeball. Although they are both in the eye, the location of inflammation is different, and there are some differences in symptoms. Conjunctivitis is caused by stimulation by foreign objects, and keratitis is caused by trauma or bacterial or parasitic infection. Conjunctivitis will cause symptoms such as photophobia, eye congestion, pain, tearing, and increased secretions from the corners of the eyes. Keratitis will cause tearing. , pain, eyelid atresia, conjunctival redness and swelling and other symptoms.