Technical specifications
| Spherical Power | -8.00D to +8.00D (±0.26D) |
| Cylindrical Power | -3.5D to +3.50D (±0.26D) |
| Axis | 0° to 180° |
| Pupil Diameter | 1.9 in to 2.7 in (50 mm to 70 mm), 0.03 in (±1 mm) |
| Measuring Distance | 39.3 in (100 cm), 1.96 in (±5 cm) |
| Measurement Time | 5 second to 15 second |
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