Clinical Outcomes of Sequential Intrastromal Corneal Ring Segments and an Extended Range of Vision Intraocular Lens Implantation in Patients with Keratoconus and Cataract

Table 2

Summary of distribution of manifest refractive errors before surgery, 6 months after ICRS implantation, and 6 months after IOL implantation, following the power vector method.

	Preoperatively	After ICRS implantation	After IOL implantation	value
M	−5.35 ± 5.09	−3.45 ± 3.88	−0.59 ± 0.80	<0.0001
J0	−0.40 ± 0.92	−0.32 ± 0.63	−0.07 ± 0.40
J45	0.17 ± 1.13	0.23 ± 0.40	−0.09 ± 0.57
B	6.28 ± 4.08	4.17 ± 3.15	0.94 ± 0.74	<0.0001

Data are shown as mean ± standard deviation. Manifest refraction in conventional script notation (S (sphere), C (cylinder) × ϕ (axis)), were converted to power vector coordinates and overall strength blur by the following formulas: ; ; ; . Statistically significant between before Keraring ICRS insertion and after IOLs implantation. Statistically significant between after Keraring ICRS implantation and after IOLs implantation.