Population | Preterm infants undergoing retinopathy of prematurity screening |
Intervention | Microdrops of phenylephrine 1.67% and tropicamide 0.33% |
Comparator | Standard drops of phenylephrine 1.67% and tropicamide 0.33% |
Outcomes | Efficacy: millimeters of pupil diameter Safety: occurrence of systemic adverse events and systemic absorption |
Study type | Non-inferiority, crossover, randomized controlled trial |