Table 2.

Corneal densitometry changes after cross-linking.

N = 31 (mean ± SD)	Preoperation	Month 1	Month 3	Month 6	Month 12
Total	15.3 ± 2.2	19.3 ± 2.5	18.1 ± 2.4	16.3 ± 2.3	15.3 ± 2.1
Φ 0–2 mm	16.0 ± 2.3	24.1 ± 5.1	23.1 ± 5.6	18.9 ± 4.7	16.8 ± 3.5
Φ 2–6 mm	14.8 ± 1.6	21.0 ± 2.5	18.7 ± 2.5	16.0 ± 1.7	14.8 ± 2.0
Φ 6–10 mm	13.3 ± 2.6	14.7 ± 2.5	14.0 ± 2.4	13.3 ± 2.3	12.8 ± 2.2
Anterior	21.3 ± 3.4	28.6 ± 4.1	26.5 ± 3.7	23.2 ± 3.5	21.3 ± 3.3
Φ 0–2 mm	23.6 ± 4.2	38.1 ± 9.0	36.1 ± 11.6	28.7 ± 8.6	24.8 ± 5.9
Φ 2–6 mm	21.0 ± 2.3	32.1 ± 4.6	28.2 ± 3.7	23.1 ± 2.4	21.1 ± 3.1
Φ 6–10 mm	17.5 ± 3.8	20.7 ± 3.6	19.1 ± 3.7	17.9 ± 3.6	16.9 ± 3.3
Central	14.1 ± 1.9	17.4 ± 2.3	16.2 ± 2.5	14.9 ± 2.2	13.9 ± 1.8
Φ 0–2 mm	15.4 ± 1.6	22.4 ± 4.9	21.3 ± 5.6	18.1 ± 4.4	16.1 ± 2.8
Φ 2–6 mm	13.3 ± 1.2	18.7 ± 2.2	16.2 ± 2.6	14.3 ± 1.8	13.1 ± 1.6
Φ 6–10 mm	12.3 ± 2.2	13.1 ± 2.3	12.7 ± 2.2	12.1 ± 2.0	11.7 ± 1.9
Posterior	10.6 ± 1.6	11.8 ± 1.6	11.6 ± 1.6	10.8 ± 1.4	10.6 ± 1.4
Φ 0–2 mm	8.9 ± 1.8	11.7 ± 2.8	11.2 ± 2.8	9.7 ± 2.2	9.5 ± 1.9
Φ 2–6 mm	10.2 ± 1.7	12.7 ± 2.3	11.7 ± 2.3	10.5 ± 1.8	10.3 ± 1.6
Φ 6–10 mm	9.9 ± 1.9	10.2 ± 1.8	10.3 ± 1.5	9.8 ± 1.4	9.8 ± 1.6

Note: Φ: Annular diameters. Bold value indicates “no” significant difference in densitometry values between preoperation and postoperation.