. 2021 Jan 18;14(1):89–96. doi: 10.18240/ijo.2021.01.13

Table 2. Comparison of corneal topography parameters of each group.

Parameters	Clinical keratoconus group (n=26)	Forme fruste keratoconus group (n=21)	High ΔK group (n=40)	Low ΔK group (n=40)
Kf (D)	45.37±3.54	42.89±1.28^a	43.02±1.37^a	42.38±0.99^a
Ks (D)	50.90±5.12	44.05±1.20^a	46.63±1.32^a,b	43.55±0.95^a
AveK (D)	48.11±4.06	43.68±1.34^a	44.79±1.22^a	42.97±0.94^a
ΔK (D)	5.31±3.11	1.14±0.62^a	3.66±0.96^a,b	1.17±0.44^a
SRI	0.94±0.56	0.15±0.13^a	0.45±0.26^a,b	0.12±0.13^a
SAI	2.42±1.76	0.48±0.39^a	0.42±0.19^a	0.28±0.11^a

Kf: Flat keratometry; Ks: Steep keratometry; AveK: Average keratometry; ΔK: Corneal astigmatism; SRI: Corneal surface regularity index; SAI: Corneal surface asymmetry index; D: Diopters. ^aP<0.05 vs clinical keratoconus group; ^bP<0.05 vs forme fruste keratoconus group.