With the EPR-1800 you will have access to a range of testing parameters as well as highly advanced progression analysis software. Reliable perimetry is the cornerstone of glaucoma screening, diagnosis, treatment and ongoing management. With the introduction of the EPR-2600 you will enjoy the highest, most respected level of technology at an incredible value.For expert perimetry, look no further than the EPR-3600. This advanced technology offers every feature you would expect in a top-of-the line perimeter.