A 2D vision system primarily handles planar (X and Y axes) geometric dimensions and image contrasts, making it ideal for flat parts or single-plane inspections. A 3D measuring instrument, on the other hand, adds Z-axis height and depth data, allowing it to inspect complex three-dimensional surfaces, steps, volumes, and 3D GD&T for comprehensive spatial analysis.

Further reading: What is a 3D Measuring Instrument? Working Principles & Selection Guide