Surface Roughness Analysis Of Porcine Corneas After Femtosecond Laser Flap Creation With Zeiss Visumax 800

To evaluate and compare the surface roughness of porcine corneal stromal bed after femtosecond laser flap creation using the Zeiss VisuMax 800, using different contact glass sizes.

The laser treatment was performed at Clinica Baviera Italia, Milan, Italy. The surface roughness analysis was conducted at the Department of Medical, Surgical Sciences and Health, University of Trieste, Trieste, Italy.
 

Ten porcine eyes were treated with the Zeiss VisuMax 800 femtosecond laser to create the corneal flap. Five eyes employing the small size (S) anatomy-fitting contact glass and five with the medium size (M). Surface roughness was quantitatively analyzed using a Sensofar confocal optical profilometer, measuring key roughness parameters. The roughness profiles obtained with the M size were compared to those generated with the S size to assess structural differences.

The analysis revealed that the Zeiss VisuMax 800 granted a smooth cutting surface at a low cutting time. The overall mean roughness shows an evenly distributed pattern with no relevant bridges or focal alterations. A mild difference in the mean roughness was observed between the S and M sizes.

This study highlights that Zeiss VisuMax 800  is able to perfom corneal flaps at high-speed cutting rates, realising smoorh corneal cuts .Differences between the S and M sizes need further investigations to be better characterized.