You might be confirming an iris scan instead.
A new collaboration between two companies is aiming to reduced healthcare errors by using iris recognition software.
Irisguard is a pioneer in iris recognition software and Patientory is the creator of the app that allows you to securely store and manage health information in real time.

Why do we need an iris scan in healthcare?
A couple reasons:
1. “According to statistics cited by Pew Research Center, up to 20% of patient records are not matched accurately within the same healthcare system, driving up costs, creating inefficiency, and risking patient safety.”
2. This could cut down on the amount of “fraud and abuse occurring within the pharmaceutical and insurance industries by ensuring patients are who they say they are.”
(via)