Table 2.

Descriptive statistics of refractive error and visual acuity in the EMR database.

Clinical Measurements	Mean	SD	Median	Min	Max	Q1	Q3	Skew	Kurtosis
Right Eye Sphere	0.28	2.39	0.25	−24.00	18.50	−0.50	1.50	−0.71	4.88
Spherical Equivalent Refraction (RE)	−0.06	2.38	0.13	−26.00	18.50	−0.88	1.00	−0.96	5.37
Right Eye Cylinder	−0.69	0.81	−0.50	−8.75	0.00	−1.00	−0.25	−2.55	9.59
J0	0.01	0.38	0.00	−4.19	3.87	−0.12	0.13	0.17	9.97
J45	−0.01	0.37	0.00	−4.32	3.92	−0.12	0.10	0.06	11.08
Right Eye Distance VA (LogMAR)	0.03	0.16	0.00	−0.30	2.08	−0.08	0.00	3.75	20.41

J0 = Primary axis, J45 = Oblique axis, SD = Standard Deviation, Min = Minimum, Max = Maximum, Q1 = 1st quartile, Q3 = 3rd quartile.

Values expressed in dioptres (except visual acuity).