Polar Value Analysis of Low to Moderate Astigmatism with Wavefront-Guided Sub-Bowman Keratomileusis

Table 1

Refractive and visual outcomes ( eyes).

Parameter	Preop mean (SD)	Postop 6 m mean (SD)	value
Sphere (D) (corneal plane)	−4.76 (2.02)	0.53 (0.28)	<0.001
Cylinder (D) (corneal plane)	−1.14 (0.82)	−0.42 (0.36)	<0.001
SER (D) (corneal plane)	−6.12 (1.96)	0.08 (0.24)	<0.001
UDVA (logMAR)	1.16 (0.33)	−0.10 (0.06)	<0.001
CDVA (logMAR)	−0.07 (0.05)	−0.11 (0.07)	>0.05

Note: sphere and cylinder by WaveScan at corneal plane. SER = sphere +1/2cylinder. Preop: preoperative visit; Postop 6 m: 6 months postoperative visit after surgery; SD: standard deviation; D: diopter; SER: spherical equivalent refraction; UDVA: uncorrected distance visual acuity; CDVA: corrected distance visual acuity.