. 2021 Apr;9(7):536. doi: 10.21037/atm-20-6628

Table 2. The corneal densitometry before and after ICL V4c implantation.

Variables	Pre-op	1-day Post-op	1-week Post-op	1-month Post-op	1-year Post-op	4-year Post-op
AL0-2 mm	20.4±1.87	21.00±2.22	19.99±1.72^ab	19.43±1.78^abc	19.04±2.05^abc	24.97±6.72^abcde
AL2-6 mm	18.22±1.75	18.99±2.06^a	17.69±1.46^ab	17.34±1.18^ab	16.99±1.89^abc	22.51±5.87^abcde
AL6-10 mm	19.20±4.41	20.62±3.97^a	18.89±3.99^b	18.26±4.03^ab	18.02±4.46^abc	22.51±6.01^acde
CL0-2 mm	12.17±0.92	12.35±0.98	11.96±0.81^b	11.80±0.69^ab	11.56±1.07^abc	15.14±3.34^abcde
CL2-6 mm	10.0±0.81	11.35±0.96^a	10.64±0.70^b	10.50±0.70^ab	10.37±1.03^ab	13.58±2.83^abcde
CL6-10 mm	12.08±2.69	13.20±2.43^a	12.23±2.47^b	11.96±2.77^b	11.87±2.93^b	15.17±3.87^abcde
PL0-2 mm	10.87±0.93	11.14±1.27	10.75±0.83^b	10.76±0.74^b	10.53±0.97 ^ab	14.03±3.50^abcde
PL2-6 mm	9.75±0.81	10.16±0.97^a	9.73±0.81^b	9.72±0.87^b	9.49±0.92^b	12.54±3.22^abcde
PL6-10 mm	11.18±2.20	11.95±1.78^a	11.46±1.88^b	11.41±2.22^b	11.26±2.34^b	14.67±3.69^abcde
TL0-2 mm	14.50±1.17	14.79±1.25	14.25±1.02^b	14.05±0.84^ab	13.71±1.29^abc	18.06±4.44^abcde
TL2-6 mm	12.93±1.04	13.45±1.17^a	12.70±0.84^b	12.52±0.79^ab	12.26±1.22^abc	16.26±3.80^abcde
TL6-10 mm	14.16±2.97	15.25±2.54^a	14.18±2.66^b	13.87±2.89^b	11.26±2.34^b	17.48±4.41^abcde

^a, vs. pre-op, P<0.05; ^b, vs. 1-day Post-op, P<0.05; ^c, vs. 1-week Post-op, P<0.05; ^d, vs. 1-month Post-op, P<0.05; ^e, 1-year Post-op vs. 4-year Post-op, P<0.05. Postop, postoperative; Preop, preoperative; AL, anterior layer; CL, central layer; PL, posterior layer; TL, total layer