Development of Ocular Surface Tribometer and Frictional Characteristics of Human Ocular Surface

The purpose of this research is to determine the frictional characteristics of human ocular surfaces. An ocular surface tribometer was developed to measure the normal forces, frictional forces, and velocities of the probe on human ocular surfaces simultaneously. In this research, the measurement on six trial subjects was performed with the developed ocular surface tribometer. In addition, a mathematical model was proposed to describe the frictional coefficient of the human ocular surface. The frictional characteristic curves were found by using the computational program employing BSG-Starcraft of PSO and LSM developed by the authors in the previous research. It was possible to classify the frictional characteristics of human ocular surfaces into three types.