Retinopathy of prematurity (ROP) is a disorder of the developing retinal blood vessels in preterm infants.
1 There are 5 stages of ROP indicating disease severity from stage 1 (demarcation line) to stage 5 (total retinal detachment). The addition of the plus sign describes increased disease activity in which retinal blood vessels at the ocular posterior pole are particularly dilated and tortuous. Most cases of ROP are mild and regress spontaneously and the cases warranting treatment are rare. However, once the need for treatment is identified, timely action is required to prevent retinal detachment with consequent vision impairment and loss.
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