Portable Auto Refractometer HAR-680
Sphere range: - 10.0D ~ +10.0D, step 0.25D
Cylinder range: -5.0D -+5.0D, step 0.25D
Axis of astigmatism range: 1°-180°, 1°
Data acquisition time <1s/ eye
Iris imaging Connections: Yes
USB. Wi-Fi. Bluetooth; easy data transfer to pc or printer