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

Table 4

Alternative scenario for cone asymmetry based on Kera manufacturer’s nomogram. Note: A, B, and C point the nomogram to follow according to manufacturer’s asymmetry classification for cones. Nomogram A when the cone is to one side or 20 : 80, nomogram B for 40 : 60 cones, while nomogram C for 50 : 50 cones.

		Tangential map (N = 64)			Total	Matching rate (%)	P value
		A	B	C
Axial map (N = 64)	A	4	24	4	32	12.5
	B	6	4	14	24	16.7
	C	0	6	2	8	25
	Total	10	34	20	64

⁺Fisher’s exact test.