Inclusion Criteria:  unilateral congenital cataract bilateral congenital cataract  Exclusion Criteria:  other ocular pathologies (such as glaucoma, microphthalmia, micro - or megalocornea, persistent fetal vasculature, retinal congenital disease, corneal scar, traumatic cataracts) systemic diseases (such as chromosomal abnormalities, prematurity or mental retardation)