Table 1.

Contralateral Comparison of Basic Parameters between Keratoconus Eyes with Vogt’s Striae and those without Vogt’s Striae

Parameter	With Vogt’s striae		Without Vogt’s striae
	Mean ± SD	Range	Mean ± SD	Range	Mean difference	P-value
Sph (D)	-3.26 ± 3.02	-10.00 to +1.75	-1.31 ± 2.07	-7.75 to +1.50	-1.95 ± 2.80	< 0.001*
Cyl (D)	-5.46 ± 2.23	-9.50 to -1.75	-2.42 ± 2.14	-8.50 to 0.00	-3.04 ± 2.44	< 0.001 *
SE (D)	-5.98 ± 3.55	-14.00 to -0.12	-2.44 ± 2.75	-11.37 to +0.88	-3.46 ± 3.26	< 0.001 *
J0 (D)	1.27 ± 2.26	-4.00 to +8.93	0.48 ± 1.05	-1.76 to +4.09	0.83 ± 1.90	0.001 *
J45 (D)	0.32 ± 1.83	-3.71 to +3.13	-0.19 ± 1.12	-3.25 to +2.62	0.55 ± 2.62	0.131 *
UDVA (LogMAR)	0.71 ± 0.47	0.1 to 1.60	0.43 ± 0.45	0.00 to 1.60	0.28 ± 0.43	< 0.001 *
CDVA (LogMAR)	0.33 ± 0.30	0.00 to 1.00	0.09 ± 0.11	0.00 to 0.40	0.25 ± 0.27	< 0.001 *
Kmǂ (D)	50.00 ± 4.41	43.20 to 63.40	46.28 ± 2.99	40.00 to 53.60	3.72 ± 3.32	< 0.001║
Kmaxǂ (D)	58.99 ± 5.65	48.10 to 71.00	52.00 ± 5.47	44.10 to 67.40	6.99 ± 4.58	<0.001║

Sph: sphere, Cyl: cylinder, SE: spherical equivalent, 𝐽0: Jackson’s cross cylinder, axes at 0 and 90 degrees, 𝐽45: Jackson’s cross cylinder, axes at 45 and 135 degrees, UDVA: uncorrected distance visual acuity, CDVA: corrected distance visual acuity, Km: mean keratometry, Kmax: maximum keratometry, D: diopter, LogMAR: logarithm of the minimum angle of resolution, SD: standard deviation,

There were no missing data. A P-value < 0.05 is statistically significant.

^ǂ was measured by Pentacam,

^* Wilcoxon signed-rank test,

^║ paired-sample t-test, bold values are significant.