Description
The Nidek ARK-560A Auto Refractometer/Keratometer is a state-of-the-art diagnostic instrument that delivers fast, accurate, and reliable objective measurements of refractive errors and corneal curvature. Built with Nidek’s renowned optical technology and precision engineering, the ARK-560A offers superior ease of use, patient comfort, and clinical efficiency, making it an essential tool for any modern optometric or ophthalmic practice.
The device utilizes advanced wavefront technology and automatic alignment to ensure consistent, repeatable measurements with minimal operator input. Its intelligent auto-tracking and auto-measurement features streamline the examination process, reducing chair time and improving workflow.
The ARK-560A’s high-resolution LCD screen and intuitive interface make operation straightforward, while its motorized chinrest and automatic focusing system enhance patient comfort and accuracy. The keratometry function provides precise corneal curvature data for contact lens fitting and preoperative evaluation for cataract or refractive surgery.
With its compact and ergonomic design, the ARK-560A fits seamlessly into any clinical environment. It is engineered for durability, quiet operation, and long-term performance, embodying Nidek’s commitment to innovation and excellence in ophthalmic instrumentation.
Whether used as a standalone unit or integrated into a digital practice network, the Nidek ARK-560A delivers the reliability, accuracy, and speed that professionals require to provide high-quality eye care.
Excellent Measurement Accuracy
Highly Accurate Refractometer
The combination of new measuring principle – Pupil Zone Imaging Method – and unique technology – SLD – offers high accuracy and reliability in refraction measurement.
1. Pupil Zone Imaging Method
The NIDEK ARK-560A / 530A / 510A adopts the advanced Pupil Zone Imaging Method for refraction measurement, which analyzes a wider area (Max. ø4 mm) to obtain more reliable and realistic data that is closer to subjective refraction.
2. SLD (Super Luminescent Diode)
The ARK-560A / 530A / 510A uses the SLD (Super Luminescent Diode) and a highly sensitive CCD device for improved image quality. The images with the SLD are sharper and more precise than those with the LED, and the system offers greatly improved measurement capability even with dense cataracts and IOL-implanted eyes.
NIDEK’s Innovative Auto Ref/Keratometer for Higher Precision and Better Operability.
Unique VA Measurement*
The ARK-560A is the unique unit that provides visual acuity (VA) measurement. This function enables a quick check of a patient’s refractive error by comparing subjective measurements with objective measurements. Even corrected visual acuity on near vision is measurable with easy operability, which allows the proposal of progressive lens necessity.
*Only for the ARK-560A
High Speed Printer with Easy Loading & Auto Cutte
Eye Care Card System*
The ARK-560A / 530A / 510A incorporates a card slot for the Eye Care card system, which provides quick, easy wireless data transfer.
*The card is optional.
Informative 5.7-inch Tiltable Color LCD
Recall Function for Vision Comparison
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A comparison between patients’ current vision of unaided eye or glasses-corrected*1 eye and corrected vision with internal spherical and cylindrical lenses*2 can be easily demonstrated. *1 Requires data transfer from a NIDEK auto lensmeter. *2 Spherical and cylindrical lenses only for the ARK-560A Spherical lens for the ARK-530A / 510A |
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Motorized ChinrestThe motorized chinrest with simple up / down button facilitates smoother operation. One-Touch LockThe main body can be fixed with the advanced one-touch lock. |
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Reliable Keratometer
The ARK-560A / 530A / 510A also offers high accuracy in keratometry measurement.
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The system provides ordinary measurement (ø3.3 mm) using a mire ring, and also peripheral measurement (ø6 mm) using 4 points, both of which offer reliable and accurate keratometry data. The ARK-560A / 530A / 510A uses double mire rings for better alignment and observation. |
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Wide Measurement Range: -30 to +25 D
The ARK-560A / 530A / 510A offers the wide measurement range of -30 to +25 D.
Small Measurable Pupil Size: ø2 mm
The ARK-560A / 530A / 510A can measure small pupils down to 2 mm in diameter, allowing wider application.
3D* Auto Tracking & Auto shot
Specifications
| Measurement Type | Auto Refraction and Keratometry |
| Measurement Range (Refraction) | Sphere: -25.00 D to +22.00 D (0.12/0.25 D steps) |
| Cylinder Range | 0 D to ±10.00 D (0.12/0.25 D steps) |
| Axis Range | 0° to 180° (1° or 5° steps) |
| Pupil Size Measurement | 2.0 to 8.0 mm |
| Vertex Distance | 0, 12, 13.75, 15 mm |
| Corneal Curvature Radius | 5.00 to 10.00 mm (in 0.01 mm steps) |
| Keratometric Range (Diopters) | 33.75 to 67.50 D (in 0.12/0.25 D steps) |
| Corneal Astigmatism Axis | 0° to 180° |
| Minimum Pupil Diameter | 2.0 mm |
| Auto Tracking / Auto Measurement | Fully automatic in X, Y, and Z axes |
| Display | 5.7-inch color LCD screen |
| Printer | Built-in thermal printer (auto cut) |
| Data Output | RS-232C, USB |
| Chinrest Movement (Vertical) | 70 mm, motorized |
| Working Distance | 40–50 mm |
| Measurement Time | Approx. 0.3 seconds per eye |
| Power Supply | 100–240V AC, 50/60 Hz |
| Power Consumption | 80 VA |
| Dimensions (W × D × H) | 286 × 500 × 485 mm |
| Weight | Approx. 18 kg (39.7 lbs) |
