Specifications & Performance Refractive Measurement Display Range: Sphere: 0 Dptr~ -29Dptr (It is possible to set to 0.125step) 0 Dptr~+26.75 Dptr(It is possible to set to 0.125step) Astigmatism: 0 Dptr~+8.75 Dptr ( It is possible to set to 0.25△ step) Astigmatic axis: 0~180?(It is possible to 1?step) Phoria: 0△ ~20△ in each direction (It is possible to set to 0.5△ step) Horizontal convergence: 0△ ~40△ in each direction (It is possible to set to 0.5△ step) Pupillary distance adjusting range: 48~80mm(Far point test mode) 50-74mm(Near, point test mode) Dimension: 436x260x110mm Weight: 7.2kgs