The studies conducted were aimed at showing the importance of early diagnosis and appropriate treatment of congenital cataracts in children. We can see that the treatment is multi-stage and often difficult not only for the performed surgical procedures but also for the further rehabilitation of eyesight. At the same time, we show how many benefits can be obtained by properly treated children. The study group consisted of patients treated at the Department of Pediatric Ophthalmology in Katowice in 2007–2014 with unilateral congenital cataract with posterior cone or unilateral congenital cataract and with simultaneous or secondary implantation of an artificial intraocular lens. 104 eyes were examined in 52 children at the age of 52 from 1 to 17 years of age.