Comparison of corneal measurements in normal and keratoconus eyes using Anterior Segment Optical Coherence Tomography (AS-OCT) and Pentacam HR topographer

Table 5 Comparison of K anterior values by PENTACAM and OCT among the studied groups

Variable	KC group	Control group	t-test^a	P value
Variable	(n = 62)	(n = 48)	t-test^a	P value
K anterior by PENTACAM:
Mean ± SD
Range	47.1 ± 3.5	43.6 ± 1.4	6.408	0.001
	42.8—57	41.1 – 47.2		(S)
K anterior by OCT:
Mean ± SD
Range	52.3 ± 4.2	47.8 ± 2.4	6.511	< 0.001
	45.6 – 64.5	41.8 – 53.1		(HS)
P^b:	< 0.001 (HS)	< 0.001 (HS)

HS Highly significant difference (p < 0.001), S Significant difference (p < 0.05)
^at-test between KC and control groups
^bt-test between PENTACAM and OCT

ISSN: 1471-2415