why was the controlled eye used why is the control eye used why is the metric scale used for pressure in both eyes? how long for paired data to come back why use the controlled eye test why was the controlled eye used why is a controlled eye used why do you use an eye pressure test why was it called the control eye study when the intraocular pressure is measured in both eyes why was the controlled eye used why are ophthalmic pressure levels used why are paired and longitudinal data used how to measure intraocular pressure how does pressure affect baseline how are pressures related to treatment what type of data can be used to analyze paired versus longitudinal data how long does a controlled eye stay at baseline why is the paired study used why are controlled eyes used in the study? how to analyze paired versus longitudinal data