☆.A.
I'm sorry I had to chuckle a little at the image I got when reading this:
Mom picks up child under arms and holds directly in front of her staring intently, questioningly (with a worried expression) directly into her 20 month old's eyes.
Child looks into mom's eyes, thinks to herself "Sheesh...why do they DO this??? and looks away.......
I'm not making light of your concern. Just make sure you're looking into it in a detached, non-threatening way. Mention it at her 2 yr. check up!