Inclusion Criteria:  Gestational age ≤32 weeks Birth Weight ≤2000 grams Receiving babies that the clinician following the baby deems at risk for the development of ROP Receiving babies who will have their first ROP examination No sedative, opioid and anticonvulsant medication given before/during the examination Parents do not have diagnosed mental or mental problems and agree to participate in the research.  Exclusion Criteria:  Presence of a condition that interferes with pain assessment (intracranial hemorrhage, neuro-motor developmental delay, etc.) Diagnosed hearing loss Performing a different painful procedure before the ROP (one hour) Being connected to a mechanical ventilator Congenital hearing problems in family members