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. Author manuscript; available in PMC: 2020 Oct 6.
Published in final edited form as: Ultrason Imaging. 2017 Jul 5;39(5):313–325. doi: 10.1177/0161734617713498

Table I.

Average Parameters for Tissue Types at AR.

Tissue K (GPa) Z (MRayl) α (dB/cm/MHz) c (m/s) ρ (g/cm3) n
TrM 2.62 ±0.17 1.64 ±0.05 10.53 ±3.01 1600* ±58 1.02 ±0.02 35
CM 2.55* ±0.10 1.58* ±0.02 6.05 ±1.56 1610* ±52 0.98* ±0.03 35
PL 2.72 ±0.17 1.66 ±0.06 9.46 ±3.21 1642 ±57 1.01 ±0.03 35
Pr 2.49* ±0.11 1.57* ±0.02 3.44* ±1.93 1586* ±61 0.99* ±0.03 35
Sc 2.71 ±0.13 1.67 ±0.06 11.70 ±2.99 1618 ±46 1.03 ±0.04 72

Values are in means ± standard deviations. Material properties (i.e., K, Z, α, c, ρ, n) of different tissue types (i.e., TrM, CM, PL, Pr, Sc) with different symbols (i.e., *, ‡, and †) have significant different mean values (i.e., p < 0.05). For example, bulk modulus of Pr (~2.49* GPa) is significantly smaller than that of Sc (~2.71† GPa). AR = angle region; TrM = trabecular meshwork; CM = ciliary muscle; PL = pigment layer; Pr = processes; Sc = sclera.