IFIS I: Predicting the severity of IFIS before surgery

Cataract surgery is one of the most frequently performed surgeries worldwide and complications are rare. However, there are factors that increase the risk of complications, such the intra-operative floppy iris syndrome (IFIS). IFIS is a syndrome usually caused by systemic alpha 1A blockers used to treat benign prostatic hyperplasia. The objective of this study is to assess the effect of selective alpha 1A blockers on the pupil size before and after the instilliation of tropicamide 0.5% and phenylephrine 10% to evaluate if there are differences between patients with selective alpha 1A receptor blockers and a control group with no history of an intake of alpha 1A receptor blockers.