How can I tell if my 1 year old needs glasses? What are some signs?

There are a few signs to look out for to see if he needs glasses. 1) is he blinking a lot if he's looking at something? 2) does he complain of headaches often? 3) is he tilting his head a lot when looking? If yes, it's best to get your child's eyes check. https://www.vsp.com/glasses-for-children.html