Why is tropicamide combined with phenylephrine?
Conclusions: The mixture of 0.75% tropicamide and 2.5% phenylephrine is superior to our standard application of 1% tropicamide alternating with 10% phenylephrine. It provides faster and more successful pupil dilatation within 40 min. Pupil dilatation is mandatory for thorough indirect ophthalmoscopy...