An introductory course answers who uses vision, what the applications are, when the data are critical, where the cameras sit, and why the results matter. Measurement, reading, flaw detection, counting, verification, and positioning show up on assembly and packaging equipment, new and existing. When the result affects product quality or process control, design, deployment, checks, use, and maintenance have to be documented across the life cycle. A follow-on course is the how. It assumes that context and spends its time in spreadsheet navigation, the six milestones, application families, iterative design, optical labs, and the code-reading habits needed when the job arrives from a machine builder. Hands-on students need an emulator, worked examples, and saved images. Everyone else still needs enough of the same model to know whether a proposed change is a setpoint tweak or a new validation.