| Range of measurement | -25m -1 ~ +25m -1 |
| Minimum scale value | -5m -1 ~ +5m -1 : 0.125m -1 ;-5m -1 ~ -25m -1 ;5m -1 ~ +25m -1 : 0.25m -1 |
| Astigmatism axisof cylindric lens | 0 ~ 180degree, Minimum scale value 1degree |
| Prism diopter | Standard model:0 ~ 5cm/m Minimum scale value 1cm/m |
| Prism basal angle | 0 ~ 180degree Minimum scale value degree |
| Regulation of ocular visivility | -5m-1~ +5m-1 |
| Size of lens | φ16mm ~ φ 80mm |
| Overall dimensions of device | 280mm (L) ×150mm (W) ×450mm (H) |
| Weight: Standard model | 4.9kg / Strengthened Model: 5kg |
| Lighting lamp | 6V / 2A 12W |
