Comparison of Riboflavin/Ultraviolet-A Cross-Linking in Porcine, Rabbit, and Human Sclera

Table 1

Stress values (MPa) for 4%, 6%, and 8% strain and calculated Young’s modulus (MPa) in brackets.

Type of sclera	Stress at 4% (MPa)	Stress at 6% (MPa)	Stress at 8% (MPa)	Ultimate stress (MPa)
Porcine
Untreated	0.0764 ± 0.0772 (1.95 ± 1.84)	0.1445 ± 0.0985 (2.41 ± 1.89)	0.2316 ± 0.1120 (2.88 ± 1.55)	5.06 ± 1.61
Treated	0.0754 ± 0.0419 (1.80 ± 1.05)	0.1581 ± 0.0779 (2.54 ± 1.30)	0.2533 ± 0.1120 (3.22 ± 1.46)	7.19 ± 2.22*
Rabbit
Untreated	0.0725 ± 0.0729 (1.76 ± 2.03)	0.1848 ± 0.1680 (3.04 ± 3.03)	0.3591 ± 0.3053 (4.46 ± 4.09)	3.83 ± 2.87
Treated	0.2623 ± 0.1696* (6.41 ± 3.80)*	0.4985 ± 0.2928* (7.85 ± 4.34)*	0.7486 ± 0.4057* (9.51 ± 5.23)*	8.13 ± 3.99*
Human
Untreated	0.4996 ± 0.3396 (12.54 ± 8.54)	0.8061 ± 0.4853 (14.05 ± 9.10)	1.0788 ± 0.6458 (14.31 ± 8.56)	4.45 ± 1.12
Treated	0.4112 ± 0.2988 (10.15 ± 7.54)	0.8039 ± 0.3997 (13.52 ± 7.77)	1.2592 ± 0.5817 (16.28 ± 7.33)	5.09 ± 1.88

∗indicates a significant differences between the control and treated scleral strips (𝑃<0.05).