I love the topo and the higher order aberrations calculations on the OPD. It helps me to show and explain to those difficult to refract patients why they can see as well as they want to be able to see. The OPD and TRS in series integrate seamlessly with our EMR. This allows us to import all that important data without the fear of data entry errors. Plus it is so much faster and efficient for the patient to have that data imported into our EMR.