Just read this thread, my DD has a squint, her left eye goes all over the place and you can't tell what she's looking at, bless her, I told the Health visitor at her 9 month check and she refered her to the hospital opthalmologist, She's now almost 13 months and I still haven't got an appointment!
I feel for your friend whooosh, my son had Neuroblastoma, being a child on a cancer ward recieving chemo is just awful, the feeling of helplessness for the parent is unbearable, prayers for recovery.
I hope you get this sorted, I must add, it's good to be a 'paranoid parent', if I wasn't, my son would not have been diagnosed and I wouldn't have had those 5 precious years with him.
It's always best to get things checked, thats what doc's are there for!
Hope it's nothing.