The Young's moduli of porcine corneal and scleral tissues and thermal shrinkage modulus were investigated.
The stress-strain relationships of the corneal and scleral tissues were measured by the uniaxial tensile test. Both measured relationships revealed nonlinear relation. Considering intraocular pressure, we calculated Young's moduli to 6.6×104 dyne/mm2 for cornea and 14×105dyne/mm2 for sclera.
The stress caused by corneal thermal shrinkage was measured isometrically. The thermal shrinkage modulus was calculated to 9% by measured stress.
Using the Young's moduli and thermal shrinkage modulus, we could theoretically analyze the mechanism of corneal curvature change by theoretical prediction.
