The present invention relates to a controller unit and methods for controlling an insulin pump. Also disclosed are materials and devices made thereof. 5 mm and a porosity of 50-80%; wherein the porosity of the sealers is larger than that of partition walls; and wherein the depth of the sealers is 3-15 mm. A variety of refractive instruments can be used, such as corneal topography systems and wavefront aberration systems. The method includes: receiving an image of a pad area of substrate; determining and registering a start point pixel; tracing pixels having the same gradation as the start point pixel; determining a boundary area; designating a direction code to next point pixel on the basis of a current point pixel; extracting maximum distance pixel coordinates; and detecting a defect of the pad area. In forward and reverse positions, the support member permits fluid communication between the pump and the motor through the support surface openings and the first porting system, and in the neutral position the support member permits fluid communication between the pump and the sump through the support surface openings and the second porting system.