12 year old girl presents to the office for an eye exam. Mom reports nystagmus when looking up close. (Mom is a nurse, knows what nystagmus is) Child has no current or past health issues. Normal weight and height. Normal developmental milestones. Normal to above average academic performance. Normal 12 year old girl extracurricular activities. (ballet lessons, softball etc) Eye exam is completely normal, 20/20 OU, normal color, stereo binocular vision tests. Basic eval of affarent and efferent motor and sensory systems is normal and equal on both sides. I look at her, and sure enough she does have nystagmus when I sit in front of her and she looks at my face, but the nystagmus is NOT illicited with any other near point target, large OR small. It's ONLY illicited with human faces! The funny thing is, I showed her a PICTURE of a human face and the nystagmus appeared. With a picture of a cat face, it did NOT. I know of no organic reason why this would occur only with human faces, so I'm sure it's rooted in some sort of psychological phenomenon though the child seems very well adjusted in every way, and was well engaged in the exam and conversation. Quite peculiar.....any thoughts?