Method and apparatus for using a personal electronic device as a measurement device

A computer or computer system, comprising:

• one or more processors designed to execute instructions;
• and
• one or more non-transitory, computer-readable memories storing program instructions for execution by the one or more processors, the instructions programmed to cause the one or more processors to execute steps of a method of viewing a live image from a microscope through a camera lens of a first personal electronic device, the steps comprising:
• receiving one or more optic powers and a calibration factor of a microscope taking the live image entered into a first graphical user interface displayed on a screen of the first personal electronic device, and
• projecting a measurement tool designed to measure dimensions in an x-axis and y-axis on a second graphical user interface displayed on the screen of the first personal electronic device with units of measurement based on the optic powers and the calibration factor entered into a formula which determines the units of measurement of the measurement tool.