Table 4. Asphericities (from a conicoid fitting) of anterior corneal elevation maps measured with different instruments (10 eyes from 5 subjects).

Asphericity		Placido-based videokerato.	Scheimpflug	sOCT (without Fan distortion)	sOCT (with Fan distortion correction)
S#1	OD	−0.12 ± 0.07	−0.02 ± 0.09	−0.22 ± 0.16	−0.13 ± 0.02
	OS	0.06 ± 0.11	−0.04 ± 0.15	−0.01 ± 0.12	−0.12 ± 0.09
S#2	OD	−0.13 ± 0.04	−0.19 ± 0.04	−0.04 ± 0.04	−0.07 ± 0.02
	OS	−0.18 ± 0.08	−0.10 ± 0.09	0.07 ± 0.01	−0.18 ± 0.01
S#3	OD	0.01 ± 0.08	−0.02 ± 0.01	−0.01 ± 0.08	−0.07 ± 0.02
	OS	−0.02 ± 0.07	−0.01 ± 0.07	0.01 ± 0.09	−0.03 ± 0.03
S#4	OD	−0.25 ± 0.11	−0.32 ± 0.00	−0.15 ± 0.05	−0.24 ± 0.03
	OS	−0.39 ± 0.00	−0.30 ± 0.02	0.07 ± 0.04	−0.34 ± 0.01
S#5	OD	−0.04 ± 0.09	0.01 ± 0.04	−0.04 ± 0.04	0.01 ± 0.04
	OS	−0.11 ± 0.04	0.02 ± 0.08	−0.06 ± 0.05	−0.12 ± 0.03