That wouldn’t necessarily mean that the US would use that information to go after them—but it could. Many immigrants already live in fear of being deported, even as they remain largely anonymous. That fear might grow unbearable if they know the government has their names and other personal details.
Eye scans could deter as many illegal immigrants to the US as a border wall - Quartz
That eye scan thing worries me tho; if it meant scaring illegal aliens OUT of the US, I'm Ok with that.
Too; "Quartz" is a pretty lib class liberal website but, change may be ready to happen since "illegal" was used instead of "undocumented".