retinal scanning (noun)

1. During World War II, retinal scanning technology was used by military personnel for identification and access control at high-security areas.

2. In the futuristic anime series, retinal scanning is commonly portrayed as a sophisticated method of entry into secret government facilities.

3. In the science fiction novel, retinal scanning is depicted as a commonly used method of biometric identification in a dystopian society.

4. In the superhero comic book, retinal scanning plays a crucial role in granting access to the hero's high-tech hideout, ensuring only trusted allies can enter.