[Clinical course and results of treatment of zone I retinopathy of prematurity].

23 infants (46 eyes) with zone I retinopathy of prematurity (ROP) were examined. Zone I ROP is characterized with distinctive clinical presentation, course, prognosis and treatment results. Coagulation of retina in active I zone ROP showed efficacy in 70%: in posterior ROP - 56,3%, in anterior ROP - 79%. Surgery was performed in 12 eyes with stage 4a-5 ROP. Lens-sparing vitrectomy at gestational age of 44-45 weeks resulted in partial or total reattachment of retina that was achieved in 5 eyes with 4a-4b stage ROP. In the other cases the surgery played an eye preserving role. Late functional results are indicative of multifactorial pathogenesis of visual function impairment in infants with I zone ROP.