Table 2.

Preoperative refractive characteristics of right and left eyes

	Right		Left
	Mean ± SD	Range	Mean ± SD	Range
Sphere*	−4.21 ± 1.52	−1.00 to −6.75	−4.11 ± 1.74	−1.00 to −6.00
Cylinder**	−1.05 ± 1.07	0.00 to −3.00	−1.03 ± 1.02	0.00 to −2.75
SE***	−4.67 ± 1.57	−1.88 to −7.00	−4.57 ± 1.51	−1.50 to −6.50
Mesopic pupil diameter (mm)	5.39 ± 0.78	4.36 to 6.35	5.42 ± 0.83	4.66 to 6.50

Notes:

^*Spherical component of the manifest refraction in the negative cylinder notation;

^**cylindrical component of the manifest refraction in the negative cyclinder notation;

^***spherical equivalent of the manifest refraction.

Abbreviations: SD, standard deviation; SE, spherical equivalent.