The work suggests that autism may be diagnosed in the first few months of life with researchers calling it a "major, major finding."
Doctors followed two groups of children from birth through two years of age. One of the groups was considered “high risk” due to having a sibling with autism.
The study used high tech eye tracking technology to record the eye movement of the children.
Then a follow up was performed when the kids were three years old.
The BBC reports there was a high incidence of connection between the kids who didn’t maintain eye contact and autism.
Scientists say the changes began between two and six months old and the less eye contact made, the greater the case of autism.
The findings are considered significant because the earlier the condition is found the more treatable doctors think it is.
The New York Times reports autism researchers did warn parents to not overreact to the news and say its not likely most would be able to tell a difference anyway.
However doctors did say "if they do have persistent concerns, they should talk to their child's pediatrician."