U need fast, objective refraction data to optimize manual refraction. Hongdee’s auto refractometer uses an open-view, non-mydriatic system to measure sphere, cylinder, and axis in under a second. The intuitive touchscreen allows easy patient data entry, and wireless connectivity ensures seamless data flow to your clinic information system.
- Open-view design: Reduces patient accommodation for accurate refractions.
- Auto fogging: Minimizes accommodation artifacts.
- Wireless LAN: Export data directly to EMR or digital chart.
| Advantages | ARK-200 | ARK-710 | ARK-900 | 
| Picture | ![]()  | 
![]()  | 
![]()  | 
| Key Strengths | Compact & portable; manual & auto capture; affordable entry-level model | Fully automated with auto-focus & eye-tracking; rotatable control panel; corneal measurement | Premium performance: auto-capture, 360° foldable panel, IOL mode, high-speed measurement | 
| Sphere Range | –25.00 D to +22.00 D | –25.00 D to +25.00 D | –25.00 D to +25.00 D | 
| Cylinder Range | 0.00 D to ±8.00 D | –10.00 D to +10.00 D | –10.00 D to +10.00 D | 
| Axis Range | 1° – 180° | 0° – 180° | 0° – 180° | 
| Measurement Speed | ~1 second / eye | ~1 second / eye | ~0.5 second / eye | 
| Pupil Diameter (Min.) | φ 2 mm | φ 2 mm | φ 2 mm | 
| Display | 5.7″ LCD | 9″ LCD | 6.5″ touchscreen | 
| Connectivity | USB | USB; wireless LAN | USB; wireless LAN | 
| Power Supply | AC 110–240 V, 50–60 Hz | AC 110–240 V, 50–60 Hz | AC 110–240 V, 50–60 Hz | 
| Footprint (Approx.) | 250 × 300 × 350 mm | 250 × 300 × 350 mm | 250 × 300 × 350 mm | 
| Corneal Astigmatic Power | 0 D to –15 D (0.12 / 0.25 D steps) | 0 D to –15 D (0.12 / 0.25 D steps) | 0 D to –15 D (0.12 / 0.25 D steps) | 
| Corneal Astigmatic Axis | 1° to 180° (1° steps) | 0° to 180° | 0° to 180° | 
| Auto Focus & Eye Tracking | Yes | Yes | Yes | 
| Rotary Prism Technology | No (ARK-200) | Yes | Yes | 
| Control Panel Rotation | N/A | 360° rotatable control panel | 360° rotatable control panel | 
| Foldable Control Panel | N/A | N/A | 90° foldable control panel | 
| Auto Paper Cutting | Yes | Yes (for printout) | Yes (for printout) | 
| Portable Option | Yes (portable model available) | No | No | 
| Dimensions (W×D×H) | 275 mm × 475 mm × 435–465 mm | 300 mm × 430 mm × 500–820 mm (linkedin.com) | 255 mm × 490mm × 460–490 mm (linkedin.com) | 
| Weight | 18 kg | 20 kg (linkedin.com) | 18 kg (linkedin.com) | 
| Power Supply | AC 110–240 V, 50–60 Hz | AC 220 V, 50 Hz (linkedin.com) | AC 220 V, 50 Hz (linkedin.com) | 
- Patient comfort: Open-view design reduces eye strain during measurement.
- High throughput: Rapid measurement cycle supports busy refraction clinics.
- Data management: Built-in storage for 1,000 exams with DICOM export.