Only VisuMax is truly “aligned” with one’s visual axis.

In addition to being more comfortable, the
true benefit of the VisuMax’s curved contact surface is that it allows one to maintain visual fixation due to its minimally-induced pressure. This allows the VisuMax laser treatment to be properly-aligned on one’s
“true visual axis”, rather than one’s pupil as a landmark as with all other femtosecond lasers. This
true alignment feature combined with ideal
spatial-positional accuracy explain why only the VisuMax is capable of a single-step femtosecond laser refractive procedure, such as SMILE, which would be impossible without these capabilities.