Please Draw by Microsoft Visio
Draw a use case diagram and a set of activity diagrams for the process of buying glasses from a viewpoint of the patient. The first step is to see an eye doctor who will give you a prescription.
Once you have a prescription, you go to an optical dispensary, where you select your frames and place the order for your glasses.
Once the glasses have been made, you return to the store for a fitting and pay for the glasses and Create a detailed (expanded) use-case description for one of the main use case .