The Justice ARK-810 / AR810A Auto Ref/Keratometer is designed for ophthalmic and optometry practices requiring automated refractive measurements. The system provides refractometry functions for measuring sphere, cylinder, axis, pupil distance, and other refractive values. The ARK-810 model additionally includes keratometry functions for measuring corneal radius, corneal refractometry, corneal astigmatism, and corneal diameter.
The instrument features a modern compact design with a 5.7-inch TFT color LCD display that can be tilted up to 80 degrees for convenient viewing. Its electronic-sensitive joystick supports one-hand operation, while the auto-tracking function assists with focus and alignment in the vertical direction.
The unit includes an IOL mode and automatic reading functionality for automated measurements. A servo-motorized chin rest allows convenient height adjustment, while the soft-lock button helps secure the measuring unit during operation.
Additional features include a built-in thermal printer with automatic cutting, power-saving settings, and support for measurement of pupils as small as 2.0 mm. The system is suitable for eye clinics, ophthalmology practices, optometry centres, and diagnostic examination rooms.
| Justice ARK-810 / AR810A Auto Ref/Keratometer – Technical Specifications | |
|---|---|
| Measurement Modes | |
| REF Mode | Refractometer |
| KER/REF Mode | Keratometer / Refractometer (ARK-810) |
| KER Mode | Keratometer (ARK-810) |
| Refractometer Specifications | |
| Vertex Distance (VD) | 0 mm / 12 mm / 13.75 mm / 15 mm |
| Sphere (S) | -20.00D to +20.00D (0.12D or 0.25D steps) |
| Cylinder (C) | 0.00D to ±10.00D (0.12D or 0.25D steps) |
| Axis (A) | 1° to 180° |
| Cylinder Form | -, +, + / – |
| Pupil Distance (PD) | 30 mm to 85 mm |
| Minimum Pupil Size | 2.0 mm |
| Measuring Time | Approximately 0.5 seconds |
| Keratometer Specifications (ARK-810) | |
| Radius of Curvature | 5.0 mm to 10.0 mm |
| Corneal Refractometry | 33.00D to 67.00D |
| Corneal Astigmatism | 0.00D to 15.00D (0.12D / 0.25D steps) |
| Corneal Diameter | 2.0 mm to 12.0 mm |
| General Specifications | |
| Display | 5.7-inch TFT Color LCD |
| Screen Adjustment | Tiltable up to 80° |
| Auto Tracking Function | ±16 mm (Up and Down Direction Only) |
| Chin Rest | Servo Motorized |
| Printer | Built-in Thermal Printer with Auto-Cut Feature |
| Power Saving | 5 / 15 Minutes |
| Jaw Panel | Maximum 55 mm |
| Power Supply | AC 100–240V, 50/60Hz, 90W |
| Unit Dimensions (L × W × H) | 480 × 270 × 445 mm |
| Unit Weight | 17 kg |
| Package Dimensions (L × W × H) | 67 × 45 × 64 cm |
| Gross Weight | 23 kg |
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