Table 2.

Median of Tangent Modulus and Structural Stiffness Distributions in the Peripapillary Sclera

	Young			Adult			Old
	10	30	45	10	30	45	10	30	45
Age (mean ± SD), y		1.5 ± 0.7			17.3 ± 5.1			22.9 ± 5.3
Tangent modulus, MPa	3.6*	8.3*	12.5*	6.5	17.9	26.6	8.8†	24.6‡	40.1‡
Structural stiffness, kN/m	1.4†	3.4‡	5.1‡	2.8	6.5	9.6	3.3	8.8†	14.4†

Data are the median (50^th percentile) for each IOP (10, 30, and 45 mm Hg). Young and old monkey groups were used in a previous study on scleral biomechanics in the aging monkey eye. Distributions from young and old monkeys were compared to those of adult monkeys by using the generalized estimating equation method. Significant differences between the young and adult groups and between the adult and old groups were found in all but one comparison.

^*P < 0.001.

^†P < 0.05.

^‡P < 0.01.