The natural ocular outcome of premature birth and retinopathy. Status at 1 year. Cryotherapy for Retinopathy of Prematurity Cooperative Group.
OBJECTIVE
To present the 1-year ocular outcome data from 2759 preterm infants.


METHODS
Data from all untreated eyes were tabulated. Retinopathy of prematurity (ROP) was listed by the lowest (most posterior) zone and highest (most severe) stage reached during the acute phase of ROP, based on examinations conducted at least biweekly.


METHODS
Examinations were performed at 23 regional study centers.


METHODS
The natural history cohort of the Multicenter Trial of Cryotherapy for ROP.


METHODS
Ocular structure and visual performance.


RESULTS
The worst posterior fundus outcome rates were in eyes with zone I, stage 3 disease (59.3% unfavorable outcome) and zone II, stage 3+ ROP involving nine to 12 sectors of 30 degrees (43.9% unfavorable outcome). Eyes with zone II ROP without plus disease or with zone III ROP are at very low risk (< 1%) of unfavorable outcome.


CONCLUSIONS
The more posterior the zone of ROP and the greater the extent of stage 3+ disease, the greater the unfavorable outcome rate.
D015331:Cohort Studies; D003452:Cryosurgery; D005123:Eye / Q000473:pathology / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D012030:Refractive Errors / Q000503:physiopathology; D012178:Retinopathy of Prematurity / Q000503:physiopathology* / Q000601:surgery*; D016896:Treatment Outcome; D014786:Vision Disorders / Q000209:etiology / Q000503:physiopathology; D014792:Visual Acuity