NIDEK ARK-F — Auto Ref/Keratometer
Keratometer / Refractometer
ARK-F combines precision and convenience, delivering fast and automated eye measurements for ophthalmic clinics.
NIDEK ARK-F — Auto Ref/Keratometer
NIDEK
NIDEK ARK-F is a next-generation auto refractometer-keratometer that combines precision, speed, and ease of use. Its NEDC (New Eye Detection Camera) automatically detects and aligns the eye, initiating measurements without manual adjustment — reducing operator error and ensuring consistent, repeatable results. The wide-pupil zone imaging technology (up to 6 mm) enables measurement of both central and peripheral refraction, providing a more comprehensive understanding of the eye’s refractive characteristics. An SLD light source and high-sensitivity CCD sensor deliver sharp, high-contrast images even under low reflection conditions. The 7″ color touch display with intuitive navigation makes operation simple and efficient, ideal for busy clinical environments. ARK-F is a perfect choice for ophthalmic clinics, hospitals, and optometry practices that prioritize accuracy, speed, and patient comfort.
Detailed information
Large pupil zone imaging method
The large pupil zone imaging method enables the measurement of wider area refraction up to 6 mm diameter and can indicate the difference between the wide area refraction and central area refraction of up to 3.5 mm diameter.
Super luminescent diode and highly sensitive CCD
Incorporation of the super luminescent diode (SLD) provides a sharper and clearer image compared to a conventional LED. The highly sensitive CCD detects the ring image even if the fundus reflection is weak.
Keratometry measurement with mire ring (available for the ARK‐F)
The mire ring is used to measure keratometry. It reduces eyelid artifacts.
Technical Specifications
Functions: auto-refraction and keratometry
Sphere range: −30.00 D to +25.00 D
Cylinder range: 0 to ±12.00 D
Axis: 0 – 180°
Keratometry range: 5.00 – 13.00 mm (25.96 – 67.50 D)
Minimum measurable pupil: ≥ 2 mm
Wide-zone measurement: up to 6 mm
Light source: SLD (Super-Luminescent Diode)
Sensor: high-sensitivity CCD
Display: 7.0″ color touch LCD, swivel / tilt design
Connectivity: USB, LAN
Voice guidance: multilingual (up to 9 languages)
Dimensions / weight: approx. 305 × 492 × 488 mm / 20 kg
