Dynamic rheooptical behavior of isolated bovine cornea

The dynamic Young's modulus E' and loss modulus E'' were obtained for isolated bovine cornea using a direct-reading dynamic viscoelastometer. Within the temperature range (0-60 degrees C) and frequency range (3.5-110 Hz) studied, both moduli were temperature and frequency independent. The dynamic birefringence of the cornea was measured in a special apparatus designed for this purpose in conjunction with the dynamic viscoelastometer. The stress-optical and strain-optical coefficients as well as the corresponding phase angles were evaluated as a function of temperature and frequency. The strain- and stress-optical coefficients were both temperature and frequency dependent.