We propose in this course to view all stromal dystrophies that can be treated by Therapeutic Excimer Laser PTK to treat epithelial and anteror stromal dystrophies.Refractive indications of Laser Excimer will be exposed with the following techniques: PRK, LASEK and LASIK. Indications, contra-indications and complications will be discussed.For high ametropia we will discuss indications, contra-indications and complications of the most frequently used phakic intra-ocular lenses.