As a CHO, I want to record whether the patient is diabetic and perform mandatory screening if they are, so that I can identify potential visual impairment in diabetic patients early.

Acceptance Criteria:

1. If “Screening” is selected as the reason for visit, the screening module should be enabled.
2. The system should display the field “Is the patient diabetic?” as mandatory with options: Yes / No.
3. If the patient is Yes (diabetic):

• Enable “Screening Performed for Diabetic Patient” (Yes / No, mandatory).
• If Screening Performed = Yes, enable mandatory fields:
  • Distance Visual Acuity – Right Eye (dropdown, single selection)
  • Distance Visual Acuity – Left Eye (dropdown, single selection)
• If either eye has visual acuity ≤ 6/18, display alert: “suspected visual impairment” and enable case identification module.

4. If Screening Performed = No, allow user to proceed without mandatory distance visual acuity fields.

5. Next button should be enabled only if the case identification module is not triggered.