Persistent hyperplastic primary vitreous. The posterior portion of the retained and proliferated fetal vitreous is attached to the optic nerve head. Anteriorly these patients have a whitish mass occupying the posterior aspect of the lens and dragging the ciliary processes towards the lens. 

Source: Usatine RP, Sabella C, Smith M, Mayeaux EJ, Jr., Chumley HS, Appachi E. The Color Atlas of Pediatrics; 2015.