The Combined Effect of Tropicamide and Phenylephrine on Corneal Astigmatism Axis

To analyze astigmatism axis changes after tropicamide and phenylephrine combined instillation.One hundred and thirty-one eyes from 66 patients enrolled this cross-sectional study. An extensive ocular examination was carried out prior to tropicamide and phenylephrine instillation. Power and axis value from flat, steep, and mean keratometry were calculated using an Auto Kerato-Refractometer (AKR). Later, topography and tomography maps were...