WBVs can diagnose all sorts of things you might not find at home-heart murmurs ( if you've never heard one, you won't know what it is), eyesight problems, obesity! Yes obesity! And as another poster stated hip problems and an undescended testicle. Please find a dr you like and take your child in!
they didn't diagnose my dd's poor vision EVER....come to find out, she's struggled with her vision for 3years before we found out..there was NO concern by any dr about my dd tripping over her own feet in an empty room-none at all. No concern over the way she tilted her head to look at stuff- no concern over her refusal to to any kind of fine manipulation play, or coloring, -- come to find out, she couldn't see what she was doing! So, just having an infant 'track' the light with their eyes is not enough, imo...i would ask about her eyesight, and got pooh poohed for asking such a thing of a young child-'she couldn't possiby need glasses at her age', type of sarcasm. She had a severe astigmatism in one eye and farsightedness, and the other eye had 500vision, nearsighted, and was very weak. Which, unf, went UNdiagnosed til she was 5 yrs old.
Obesity---one dr had the nerve to tell me my 8mo old at 17lbs was obese!!! We never went back there again! I don't have much trust at all in drs...i pretty much question EVERYTHING they do.