0500050 Retinopathy of prematurity stage 1

0500051 Retinopathy of prematurity stage 2

0500052 Retinopathy of prematurity stage 3

0500053 Retinopathy of prematurity stage 4 2

0500056 Retinopathy of prematurity stage 5 2

0500059 Retinopathy of prematurity zone I

0500060 Retinopathy of prematurity zone II

0500061 Retinopathy of prematurity zone III

0500062 Retinopathy of prematurity plus

0500063 Retinopathy of prematurity pre-plus

0500064 Retinopathy of prematurity threshold

0500065 Retinopathy of prematurity prethreshold