Characterization of postoperative LASIK ectasia features on higher-order aberration excimer ablation maps

BMC Ophthalmology

Table 2 Pearson correlation between ablation depth and Orbscan Indices

Parameters	Depth of island #1/4	Depth of island #2	Depth of island #3	Δ islands #3 and #2
Kmax	0.4420 (0.0185)	-0.07 (0.7356)	0.40 (0.0344)	0.59 (0.0009)
Steepest K	0.24 (0.2278)	0.10 (0.6295)	0.17 (0.3881)	0.19 (0.3413)
SimK	0.75 (< 0.0001)	0.36 (0.0625)	0.74 (< 0.0001)	0.84 (< 0.0001)
CII (3 mm)	0.90 (< 0.0001)	0.62 (0.0005)	0.91 (< 0.0001)	0.95 (< 0.0001)
CII (5 mm)	0.92 (< 0.0001)	0.65 (0.0002)	0.93 (< 0.0001)	0.96 (< 0.0001)
Steepening (5 mm)	0.76 (< 0.0001)	0.48 (0.0095)	0.76 (< 0.0001)	0.80 (< 0.0001)
CCT	-0.20 (0.3080)	-0.20 (0.3103)	-0.21 (0.2942)	-0.18 (0.3506)
Post. Elevation	0.71 (< 0.0001)	0.37 (0. 0542)	0.74 (< 0.0001)	0.84 (< 0.0001)

Values reported as Pearson correlation coefficient R. P-values are reported in brackets. Values in bold indicate P < 0.05. Island #1/4 = deep peripheral crescents; Island #2 = shallow paracentral superior ablation island; Island #3 = deep paracentral inferior ablation island; CCT = Central Corneal Thickness; CII = Corneal Irregularity Index; Kmax = maximal keratometry; Post. = Posterior; SimK = Simulated keratometry (anterior); Δ = Difference between the two islands

ISSN: 1471-2415