Detecting defects in high hydration level biological samples is challenging due to the high transparency in visible wavelength, high absorption of water in electromagnetic wave, strong scattering and refraction, heterogeneous composition as well as its inherent dynamic nature. Shearography has been effectively used for defect imaging in various industries but less reported in biological tissues imaging. In this study, we explore the application of shearography technique for detecting surface and deep-level cracks or scratches in contact lenses. Additionally, we investigate the use of pulsed terahertz (THz) broadband spectroscopy and imaging for the same contact lens samples for comparison. The results from both imaging techniques were compared, highlighting the strengths and limitations of each method in characterizing defects in high hydration level biological samples.