Changes in Intraocular Pressure after Transepithelial Photorefractive Keratectomy and Femtosecond Laser In Situ Keratomileusis

Table 2

Potential factors associated with changes in IOP and bIOP after FS-LASIK and TPRK.

	LASIK (N = 93)		PRK (N = 104)
	∆IOP	∆bIOP	∆IOP	∆bIOP
SE (D)	0.225	0.073	0.254	0.085
Average K (D)	0.099	0.047	−0.182	−0.162
Depth of ablation (μm)	−0.426	−0.146	−0.278	−0.029
IOP preop (mmHg)	−0.423	--	−0.194	--
bIOP preop (mmHg)	--	−0.263	--	−0.240
CCT (μm)	−0.310	−0.063	0.129	0.271
A1L (mm)	−0.139	−0.093	0.199	0.231
A1V (m/s)	0.293	0.190	−0.067	−0.113
A2L (mm)	−0.025	−0.031	0.002	0.034
A2V (m/s)	−0.088	−0.140	−0.213	−0.200
A1T (ms)	−0.435	−0.279	−0.211	−0.169
A2T (ms)	0.205	0.094	0.117	0.058
Radius (mm)	−0.084	−0.042	0.107	0.112
PD (mm)	0.178	0.082	0.152	0.112
DA (mm)	0.215	0.137	0.187	0.154
Young’s modulus (MPa)	0.019	0.015	−0.113	−0.116
CBI	0.330	0.169	0.063	−0.031
DA ratio	0.400	0.278	−0.124	−0.198
Integr. radius (mm^−1)	0.284	0.148	−0.038	−0.075
ARTh	−0.193	−0.087	−0.061	−0.011
SP-A1	−0.324	−0.108	0.010	0.110

Correlation coefficient. and . FS-LASIK, femtosecond laser in situ keratomileusis; TPRK, transepithelial photorefractive keratectomy; SE, spherical equivalent; K, keratometric readings in diopter; IOP, intraocular pressure; bIOP, biomechanically corrected IOP; A1L, first applanation length; A1V, applanation-1 velocity; A2L, second applanation length; A2V, applanation-2 velocity; PD, peak distance; DA, deformation amplitude; CCT, central corneal thickness; A1T, applanation-1 time; A2T, applanation-2 time; CBI, Corvis Biomechanical Index; DA ratio, DA ratio at 2.0 mm; Integr. Radius, the integrated area under the radius of the inversed curvature during the concave phase; ARTh, Ambrósio’s relational thickness in the horizontal profile; SP-A1, stiffness parameter at applanation 1.