INSTRUMENTATION CORE SUMMARY The Instrumentation Module provides Center for Visual Science (CVS) faculty with the expertise in electrical, mechanical, and computer engineering necessary to develop novel devices and instruments. The Module is staffed by three engineers with highly complementary backgrounds and skillsets. Together, they enable the design, development, and refinement of custom electronics (both analog and digital) as well custom mechanical devices. The Instrumentation Module serves as the point of reference for the development of new experimental capabilities, assisting participating faculty members from the very conception of ideas to the installation of the new instruments in their laboratories. Thus, the experience and specialized expertise of the module’s staff are an important foundation of the CVS research effort, making the Instrumentation Module essential for CVS to continue breaking new ground in vision research.