Impact of coronary artery bypass grafting surgery on the chorioretinal biomicroscopic characteristics

Table 5 Comparison of best-corrected visual acuity, choroidal and macular thicknesses, macular and prepapillary nerve fiber layer thicknesses, arterial and venous caliber before and after coronary artery bypass grafting in patients with vision loss

	mean ± SD	Median (range)	P value1
Preoperative BCVA (decimal)	0.75 ± 0.16	0.8 (0.5, 0.9)	0.002
Postoperative BCVA (decimal)	0.64 ± 0.17	0.7 (0.4, 0.8)
Preoperative BCVA (logMAR)	0.13 ± 0.10	0.10 (0.05, 0.30)	0.003
Postoperative BCVA (logMAR)	0.21 ± 0.13	0.15 (0.10, 0.40)
Preoperative choroidal thickness	290.36 ± 37.70	304 (212, 343)	0.964
Postoperative choroidal thickness	290.27 ± 40.06	300 (218, 345)
Preoperative macular thickness	262.18 ± 15.31	261 (235, 284)	0.035
Postoperative macular thickness	264.73 ± 15.77	260 (233, 286)
Preoperative macular NFL thickness	12.64 ± 2.11	12 (10, 18)	0.903
Postoperative macular NFL thickness	12.64 ± 2.66	13 (10, 19)
Preoperative prepapillary NFL thickness	106.55 ± 11.12	110 (89, 125)	> 0.999
Postoperative prepapillary NFL thickness	106.64 ± 11.75	112 (89, 126)
Preoperative venous caliber	97.30 ± 9.03	96.0 (87.0, 110.6)	0.228
Postoperative venous caliber	96.60 ± 10.05	95.0 (85.1, 109.0)
Preoperative arterial caliber	78.45 ± 6.34	79.6 (66.3, 86.3)	0.689
Postoperative arterial caliber	77.98 ± 6.98	78.3 (66.0, 91.0)

¹Paired t test.

BVCA: Best-corrected visual acuity; NFL: Nerve fiber layer.