*8.1.2 Additive procedure (keratophakia in the stroma)*

 Since 1949, Barraquer has been studying keratophakia as a technique of sculpting corneal curvature by adding tissue. As a result of inconsistencies in the quality of the cuts and reactive wound healing at the borders of the cut, the procedure was often abandoned. New steps toward keratophakia are being taken as a result of advances in femtosecond technology. For starters, an intrastromal pocket or stromal bed can now be prepared with better precision. A second development is the creation of novel inlay materials. Decellularization and preservation of extracted lenticules following lenticule extraction procedures are the subject of current research [ 16 ]. Anterior OCT should be examined pre and postoperative together with topography and slit photo for the changes that have been resulted from process ( **Figure 10** ).

### **Figure 10.**

 *Fs laser cut pattern example guided by optical coherence tomography (OCT) for additive refractive surgery.* 
