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Corneal topographies.. Notes: (A) Pre-Supracor shows with-the-rule astigmatism. (B) 1 year post-Supracor shows the steep Supracor bump to be slightly off-center. (C) Difference map pre-Supracor versus 1 year post-Supracor shows the magnitude and area of steepening caused by supracor and change in topography from (A) to (B). (D) 6 months post-reversal shows some flattening of the Supracor bump with recentration and decrease in the corneal steepness. (E) Difference map pre-Supracor reversal versus 6 months post-reversal shows where the flattening occurred specifically in the decentered steep area and change in topography from (B) to (D).. Abbreviations: A-B, difference map showing change from topography A to B; B-D, difference map showing change from topography B to D; N, nasal; OS, oculus sinister (left eye); T, temporal.
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Aberrometry and corneal topography were also performed as noted in Figure 1A and Table 1. The pre-Supracor map (Orbscan, Bausch & Lomb Incorporated) showed with-the-rule astigmatism (Figure 1A). One year post-Supracor, we observed marked steepening which looked decentered superiorly (Figure 1B). The difference map between the pre-Supracor and the 1 year post-Supracor (which is also the pre-Supracor reversal screening) topographies showed off-center superior steepening with significant astigmatism (Figure 1C). Topography 6 months after reversal showed recentration and a decrease in corneal steepness and astigmatism (Figure 1D).