Nanomechanical and Nanotribological Properties of Contact Lenses - Effect of Hydration and Temperature

摘要

This investigation used nanoindentation to test the nanomechanical and nanotribological properties of commercial contact lenses at different temperatures and hydration levels to emphasize the importance of accurate and realistic environmental control before data collection. There was found to be a significant increase in reduced elastic modulus with increasing temperature, and an increase in friction coefficient with decreasing hydration level. By understanding how relatively small fluctuations in these conditions can create large changes in the measured mechanical properties, and defining tip selection and load functions, more accurate test protocols can be determined for the nanoscale testing of biomaterials. This will allow a better prediction of comfort and durability of contact lens materials before the final product is actually made.