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We report the case of a female patient, 56-year-old housewife, for the first time user of last generation contact lenses: Lotrafilcon B, which presented a severe corneal ulcer by Pseudomonas aeruginosa in hev left eye and subsequently required keratoplasty. Initially she reported pain and arrived at the emergency department with red eye, corneal central ulcer of three days of evolution and hypopion. Initially she received topic mydriatic drugs and prednisolone at 1%. At the next day the ophthalmologycal exam showed hypopion at 5% and a central severe ulcer greater than 3 mm in diameter with sharp edges and mucopurulent secretion. The treatment was changed to moxifloxacin and natamycin. The microbiological analysis performed in two laboratories yielded Aspergillus sp. and Pseudomonas aeruginosa sensitive to ciprofloxacin, tobramycin, gentamicin and moxifloxacin. The presence of Aspergillus was interpreted as a pollution lens case and likely colonization of the cornea because of the patient good performance. After four months although improving she required corneal transplantation. Photographic documentation of the case under illumination with slit lamp is presented.