Evaluation of a Tangential Map-Based Nomogram for Intrastromal Corneal Ring Segments’ Implantation in Keratoconus: One Year Results

Table 6

Value of change in outcomes of both groups at follow-up visits.

Variable	3 months			6 months			12 months
	Axial	Tangential		Axial	Tangential		Axial	Tangential
Δ UDVA	0.11 ± 0.07	0.2 ± 0.09	0.02	0.13 ± 0.08	0.3 ± 0.2	0.03	0.15 ± 0.1	0.35 ± 0.2	0.01
Δ CDVA	0.12 ± 0.07	0.1 ± 0.19	0.8	0.13 ± 0.04	0.25 ± 0. 2	0.002	0.15 ± 0.05	0.4 ± 0.1	0.003
Δ MRSE	3.3 ± 1.3	4.5 ± 2.9	0.3	3.7 ± 1.2	5.3 ± 3.1	0.04	3.9 ± 1.1	5.4 ± 3.1	0.03
Δ Kmax	−4.5 ± 1.3	−4.7 ± 2.3	0.2	−5.4 ± 2.09	−5.98 ± 1.69	0.2	−5.8 ± 0.8	−6.2 ± 3.1	0.3
Δ Km	−3.3 ± 1.2	−4.00 ± 1.8	0.5	−3.6 ± 1.3	−4.2 ± 2.9	0.7	−4.7 ± 1.2	−6.00 ± 1.2	0.1
Δ Q value	−0.45 ± 0.2	−0.5 ± 0.3	0.8	−0.4 ± 0.5	−0.6 ± 1.5	0.5	−0.5 ± 0.6	−0.65 ± 0.3	0.4
Δ thinnest location	32.6 ± 16.6	20.5 ± 12.2	0.3	7.3 ± 5.4	19.2 ± 14.7	0.4	25.1 ± 14.1	26.1 ± 12.7	0.9