Can you tell me if a unilateral posterior polar cataract has congenital onset?

Hi doctor,

Can you please tell me if a unilateral posterior polar cataract has a congenital onset or develops after birth? I am desperately seeking answers as my daughter who is 5 years old has been diagnosed for the first time with a congenital polar cataract. The doctor who originally diagnosed her stated with confidence that it has been there since she was born. My daughter has been diagnosed with 20/300 vision and deprivation amblyopia. I took her to another doctor to get a second opinion and he stated there is really no way to tell if it has been there since birth but stated it could have been. How was the first doctor ableto make this diagnosis with such confidence when another doctor stated there is really not a way to tell? From what I have researched online, posterior polar cataract is very rare and has a congenital onset, is this true? The second doctor has started her on a patching regimen for half of her waking day. Her vision has not improved since she has started wearing her eyeglasses and I am wondering how much or if at all it will improve, with such a late diagnosis. Also, I, unfortunately, contracted HSV type 1 during my third trimester while I was pregnant with her and I have also read that this could be a cause, is this a potential cause? If it is a cause in your professional opinion, would you recommend that a newborn born to a mother with HSV 1 developed during late pregnancy with an ophthalmological issue due to the risk? Any input you can offer will be greatly appreciated. Thank you in advance.

Thank you doctor,

The second diagnosis was by a pediatric ophthalmologist and he stated that surgery would probably do more harm than good and it is not in the visual axis and he would just watch it to see if it progresses.