<unk>  is the most common eye infection in which inflammation causes dilation of conjunctival blood vessels giving the eye a reddish aspect. The most common cause of<unk>  is infection of which viral infections are the commonest cause, followed by bacterial. The non-infection forms are allergic, mechanical, toxic and neoplastic. Among noninfectious<unk> , the allergic form is more common. Infectious<unk>  presents with many similar symptoms regardless of the cause, such as: red eye, foreign body sensation, itching, light sensitivity, burning. Watery discharge is common in viral<unk>  while mucopurulent discharge is more suggestive of bacterial cause. Regarding the onset and severity of clinical symptoms,<unk>  is classified as acute, chronic, and recurrent. Most cases of infectious<unk>  are considered as acute<unk> . Allergic<unk>  can be chronic while it can be present with acute exacerbations related to seasonal factors or contact lens use. It is important to differentiate<unk>  from other sight-threatening eye diseases that have similar clinical presentation.
Conjunctivitis
Eyelash
Laryngitis
Pharyngitis
Sinusitis  
Sinusitis
Cerebritis
Rhinitis