Postoperative Corneal and Surgically Induced Astigmatism following Superior Approach Manual Small Incision Cataract Surgery in Patients with Preoperative Against-the-Rule Astigmatism

Table 2

Results of the Cartesian coordinates based analysis.

Type of astigmatism	Mean ± SD		Centroid; (mean ± SD)	Coherence (%)
	value	value
Preoperative astigmatism			1.42 × 179; (1.49 ± 1.34)	95
12-week postoperative astigmatism			2.48 × 0; (2.80 ± 1.40)	89
SIA at 12 weeks			1.07 × 1; (1.62 ± 0.90)	66

SIA: surgically induced astigmatism; SD: standard deviation. Centroid values are presented as plus cylinders in diopters.