If you have been provided a QR code for login, you can scan the code with the PeriopSim iPad app. Start the iPad application. Tap the button for scan QR code. Aim the camera on the back of the iPad at the QR code within the targeting reticule and hold the iPad still. The iPad will then log you into the system.
If the Camera view is blank, this could be due to PeriopSim app not having permission to the camera. Open the iPad's Settings app, scroll down and select privacy on the left hand side. Select Camera on the right hand side and then find PeriopSim. Ensure that the switch is turned on for PeriopSim. Return to the iPad application and the camera should now be enabled.