Stages 1 and 2 do not lead to blindness. However, they can progress to the more severe stages. Threshold disease is defined as disease that has a 50% likelihood of progressing to retinal detachment. Threshold disease is considered to be present when stage3<unk>  is present in either zoneI or zoneII, with at least five continuous or eight total clock hours of disease, and the presence of plus disease. Progression to stage4 (partial retinal detachment), or to stage5 (total retinal detachment), will result in substantial or total loss of vision for the infant. * Refractive errors including myopia (most common) * Squint * Amblyopia * Retinal detachment, traction of the retina and blindness * Glaucoma *Impairments in visual acuity, contrast sensitivity, visual field, convergence, and accommodation
Retinopathy of prematurity
Vitreoretinopathy
Meningism
Familial exudative vitreoretinopathy
Neonatal jaundice
Neonatal encephalopathy
Neonatal conjunctivitis
Congenital cataract