"The legal, technical and financial conditions are ready to start the process of issuing this identity document," Felipe Zamora, responsible for legal affairs at the Mexican Interior Ministry, told journalists Thursday.
The documents, which will include the eye's image as well as fingerprints, a photo and signature, will be 99 percent reliable, Zamora said.
Critics, including the National Human Rights Commission, have slammed the system, expressing concern that compiling personal data could violate individual rights.
The move will be introduced gradually, with some 28 million minors taking part in a first two-year stage, due to cost 25 million dollars. The cards are due to start for adults from 2013.
Iris recognition is increasingly used in airports, controlling access to restricted areas, and prisoner booking and release.
