Treatment of choice for congenital cataract is –
Extracapsular cataract extraction (ECCE) with primary posterior capsulectomy and anterior vitrectomy is the procedure of choice (via limbal or pars plana approach). This is done by phacoemulsification.
After cataractous lens extraction, the child is treated:-

i) If < 2 years old → Extended wear contact lenses.
ii) If > 2 years old → Posterior chamber IOL implantation.
Pharmacotherapy
Combined cataract surgery and Goniotomy
Cataract surgery with IOL implant and primary posterior capsulotomy
Pars plana lensectomy with no IOL implant