**Acknowledgements**

on the recipient's cornea should be of enough size to extract the entire infected area, and the donor's corneal graft should be 0.5mm bigger than the measurement made on the re‐ cipient's cornea. It is advisable to obtain cultures from one half of the obtained cornea tis‐ sue (including stains and special culture media), and the other half should be sent for histopathological study. Sutures should be placed separately due to intense inflammatory reaction. In the postoperative period, corticosteroid therapy should be continued as well as specific antibiotics. Systemic therapy should continue. Posterior to the complete resolu‐ tion of corneal infection, an optical PKP is an option of treatment to seek visual rehabilita‐ tion, as seen in out patient that appears on [Table 7]. As a consequence of the long term infectious process caused by mycobacterium keratitis, secondary cataract formation can be induced by the production of toxins, iridocyclitis, treatment toxicity and corticosteroid us‐ age. For this complication, and optic PKP combined with a cataract extraction and Ahmed valve implantation can be considered as a treatment option, as seen in patient 1 who de‐

**Figure 14.** Patient 1 treated with optic PKP combined with Ahmed valve implantation and cataract extraction with

We describe our experience in patients who developed keratitis caused by nontuberculous mycobacteria. As the most common cause of post-LASIK keratitis is NTM, a greater degree of suspicion, recognition of typical clinical course and presentation, and knowledge of simi‐ lar cluster of NTM keratitis prompts rapid institution of appropriate antibiotic therapy, granting this cases with a better prognosis in comparison with those of late diagnosis. Anti‐ biotic resistance continues to be an emerging problem, thus a limitation in the coverage of this pharmacological agents exists. We emphasize the need for vigilance in the follow-up of patients. Appropriate adjustment of antimicrobial therapy may be required based on cul‐ tures and sensitivity tests when atypical mycobacteria are responsible for corneal infection.

colocation of intraocular lens posterior to the resolution of nontuberculous mycobacterial keratitis.

veloped glaucoma.[Table 6,7]

166 Common Eye Infections

**11. Conclusion**

We express our gratitude to the cornea service and pathology service at Asociación Para Evitar La Ceguera en México "Hospital Dr. Luís Sánchez Bulnes" for their valuable contri‐ bution with images that helped making this chapter possible. Also to Miss. Elia Portugal for her assistance in the translation of this work.
