Classification of ROP :

2. AP-ROP This was formerly called as Rush disease or Fulminate ROP or type II ROP (Fig 2). It is now named as aggressive posterior ROP (AP-ROP). This is more commonly seen in babies with birth weight < 1200 grams or before 24 weeks of gestation. However in developing countries it is also seen in bigger babies. AP- ROP does not follow the classic pattern of stage 1 through stage 5. This disease is very aggressive and progresses rapidly to cause retinal detachment and blindness. 21,22 Hence in children at risk of developing this disease; the screening should be performed within two weeks after birth, follow up and the treatment be more aggressive

3. Plus Disease: Typically, this is an active form of ROP where the blood vessels at the posterior pole are dilated and tortuous (Fig 3). Presence of Plus disease signifies the need of urgent LASER or CRYO therapy, which is generally performed within 48-72 hours.