Table 2.

Descriptive statistics of SyntEyes used (mean ± standard deviation).

Model	Correction modality	Type	Sphere, D	Cylinder, D	VSX
Normal (n = 20)	Uncorrected (Seidel)	Residual	–0.74 ± 3.10	–0.78 ± 0.40	0.055 ± 0.091
	Uncorrected (Zernike)	Residual	–1.04 ± 3.00	–0.66 ± 0.35	0.055 ± 0.091
	Spherical spec corr.	Best corr.	–1.10 ± 2.37		0.158 ± 0.082
	Toric spec corr.	Best corr.	–0.38 ± 2.46	–0.73 ± 0.39	0.329 ± 0.040
	Spherical SCL corr.	Best corr.	–0.88 ± 2.15		0.214 ± 0.045
	Toric SCL corr.	Best corr.	–0.73 ± 2.26	–0.40 ± 0.13	0.387 ± 0.036
Keratoconus (n = 20)	Uncorrected (Seidel)	Residual	–2.84 ± 5.72	–4.27 ± 2.45	0.013 ± 0.011
	Uncorrected (Zernike)	Residual	–2.73 ± 3.56	–2.82 ± 1.77	0.013 ± 0.011
	Spherical spec corr.	Best corr.	–5.30 ± 4.68		0.034 ± 0.018
	Toric spec corr.	Best corr.	–4.31 ± 6.73	–6.53 ± 3.27	0.094 ± 0.028
	Spherical SCL corr.	Best corr.	–0.11 ± 2.06		0.198 ± 0.070
	Toric SCL corr.	Best corr.	+0.57 ± 2.18	–0.80 ± 0.58	0.312 ± 0.056

Corr = correction; SCL = scleral contact lens; Spec = spectacle.