<prompt> Retinopathy of prematurity-risk factors are all exceptPrematurityBih weight less than 1.5 kgExcessive oxygen usedPolyhydramnios  <response>: Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 283Impoant risk factors for ROM are:-Primary: Prematurity: Gestation age 32 weeks most impoant: Bih weight 1.5kg; Oxygen therapy: Excessive oxygen useOther: Sepsis, multiple blood transfusions, apnoeic spells, metabolic acidosis, use of aminophylline antibiotics 