This is the scanning of the eye to verify the identity of registered voters before they are cleared to vote.
The machines have been under trial since 2015 ahead of the election held on November 13. It was successful and they made history.
Most countries including Ghana, Kenya and Angola use the fingerprint biometric voting system to identify registered voters.
It eliminated the problem of double voting. The disadvantage is mostly technical including the breakdown of machines and the running down of batteries which sometimes slows the process.
These problems did not affect the elections in anyway.
Somaliland has shown the way and I am sure the world will follow soon.