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

Table 8

The value of change at 12 months for both groups with different cone locations. ThL: thinnest corneal location.

	Central cones			Paracentral			Peripheral
	Axial (n = 2)	Tangential (n = 4)		Axial (n = 8)	Tangential (n = 18)		Axial (n = 24)	Tangential (n = 6)
Δ UDVA	0.2 ± 0.1	0.3 ± 0.1	0.2	0.23 ± 0.1	0.35 ± 0.2	0.5	0.15 ± 0.1	0.4 ± 0.1	0.001
Δ CDVA	0.2 ± 0.08	0.3 ± 0.05	0.5	0.25 ± 0.07	0.4 ± 0.1	0.3	0.1 ± 0.1	0.45 ± 0.05	0.002
Δ MRSE	4.2 ± .1	5.1 ± 1.6	0.6	4.6 ± 1.4	5.6 ± 2.3	0.4	3.3 ± 0.9	5.3 ± 2.7	0.01
Δ Kmax	−5.1 ± 1.3	−6.3 ± 2.3	0.3	−5.5 ± 2.09	−5.9 ± 1.69	0.4	−6.3 ± 0.8	−6.5 ± 1.1	0.06
Δ Km	−4.5 ± 1.2	−5.8 ± 1.4	0.3	−4.6 ± 1.3	−6.7 ± 1.8	0.2	−4.9 ± 2.5	−5.2 ± 1.5	0.1
Δ Q	−0.4 ± 0.2	−0.6 ± 0.2	0.4	−0.5 ± 0.2	−0.7 ± 0.4	0.5	−0.5 ± 0.6	−0.5 ± 0.3	0.5
Δ ThL	26.3 ± 1.5	22.4 ± 9.2	0.2	24.8 ± 2.5	27 ± 12.7	0.3	27.2 ± 11.2	26.1 ± 10.3	0.7