Pocket Versus Tunnel ICRS for Treatment of Keratoconus

"Patients in this group are planned to undergo ICRS implantation through a femtosecond laser-assisted pocket creation.~The device creates an intrastromal corneal pocket of 8-mm diameter and a depth of nearly 80% of the corneal thickness at the thinnest location with a superior tunnel incision at 90° of 5-mm width."

"Patients in this group are planned to undergo ICRS implantation through a femtosecond laser-assisted tunnel creation.~The device creates an intrastromal tunnel with a depth of nearly 80% of the corneal thickness at the site of implantation. The tunnel inner and outer diameters are at 5 and 6 mm from the corneal center, respectively with the incision located at the steepest keratometry axis."