34
Evaluation with the Pentacam® revealed no posterior elevation abnormality and no evidence of
postoperative ectasia
(Figure 35)
.
The patient underwent routine LASIK enhancement without incident.
Note:
This case demonstrates one of the limitations with the current version of the Bausch & Lomb
Orbscan®. This device routinely fails to correctly identify the posterior corneal surface in
postoperative patients, leading to underestimates of residual bed thickness and frequent incorrect
diagnosis of post-LASIK ectasia.
Here the Orbscan® incorrectly reads the corneal thickness 37 μm thinner than the Pentacam®,
incorrectly suggesting ectasia
(Figure 36)
. The Pentacam® shows a normal postoperative
appearance
(Figure 37)
.
Figure 35: 4 Maps Selectable revealing there to be no post-LASIK ectasia
8 Corneal ectasia
