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 alignment
feature, combined with ideal spatial-positional accuracy
, explain why only the VisuMax is solely-capable of a single-step femtosecond laser refractive procedure, such as SMILE, which would be impossible without these capabilities.