**7. Problem statement**

Viral keratitis is more often diagnosed in any ages in developed countries. Bacterial keratitis related to contact lens use and subsequent to a conjunctivitis are more frequent than fungal corneal ulceration often caused by trauma contaminated with organic soil in patients with agricultural or related activities, in developing and undeveloped countries.

All this corneal infections are important cause of visual loss in children or in males and fe‐ males in productive ages; for these reasons, itis very important an early clinical and micro‐ biological diagnoses and specific medical or surgical treatment in order to reach a better visual prognosis for those affected patients.
