. 2018 Spring;7(1):32–39.

Table 1.

Pre and Post-Operative Vision and Refraction Results in the Intacs Intracorneal Ring Segments (ICRS) and Phakic Toric Implantable Collamer Lens (TICL) Groups

Variable	Mean (SD)		P-value
Variable	Group ICRS	Group TICL	P-value
LogMar UCDVA (Snellen)
Pre-operative	0.65 (0.22)	0.82 (0.30)	0.09
6 months post-operative	0.39 (0.08)^*	0.11 (0.08) ^*	<0.01
1 year post-operative	0.39 (0.09) ^*	0.13 (0.10) ^*	<0.01
2 years post-operative	0.40 (0.13) ^*	0.10 (0.10) ^*	<0.01
3 years post-operative	0.43 (0.12) ^*	0.09 (0.08) ^*	<0.01
4 years post-operative	0.41 (0.12) ^*	0.10 (0.07) ^*	<0.01
LogMar BCDVA (Snellen)
Pre-operative	0.37 (0.11)	0.15 (0.11)	<0.01
6 months post-operative	0.32 (0.08) ^*	0.09 (0.11) ^*	<0.01
1 year post-operative	0.35 (0.09)	0.04 (0.17) ^*	<0.01
2 years post-operative	0.34 (0.09) ^*	0.07 (0.15) ^*	<0.01
3 years post-operative	0.34 (0.10) ^*	0.06 (0.14) ^*	<0.01
4 years post-operative	0.33 (0.09) ^*	0.09 (0.14) ^*	<0.01
Spherical Equivalent (D)
Pre-operative	-5.70 (3.14)	-8.57 (4.86)	0.06
6 months post-operative	-3.65 (1.39) ^*	-0.85 (0.29) ^*	<0.01
1 year post-operative	-3.67 (1.32) ^*	-0.97 (0.26) ^*	<0.01
2 years post-operative	-3.57 (1.42) ^*	-0.70 (0.19) ^*	<0.01
3 years post-operative	-3.58 (1.28) ^*	-0.75 (0.23) ^*	<0.01
4 years post-operative	-3.15 (2.19) ^*	-0.73 (0.26) ^*	<0.01
Astigmatism (D)
Pre-operative	-6.25 (2.93)	-4.83 (2.06)	0.14
6 months post-operative	-4.67 (1.97) ^*	-1.05 (0.74) ^*	<0.01
1 year post-operative	-4.10 (2.81) ^*	-0.97 (0.55) ^*	<0.01
2 years post-operative	-4.03 (2.82) ^*	-1.00 (0.58) ^*	<0.01
3 years post-operative	-4.17 (2.81) ^*	-1.02 (0.51) ^*	<0.01
4 years post-operative	-4.98 (1.68) ^*	-1.00 (0.53) ^*	<0.01

SD= standard deviation; ICRS= Intacs intracorneal ring segments; TICL=phakic toric Implantable Collamer Lens; UCDVA=uncorrected distance visual acuity; BCDVA= best corrected distance visual acuity; Snellen= Snellen visual acuity chart; D= diopters.

= P values less than 0.05.