Nidek ARK-560A – Autorefractor Keratometer – Used

Description

What’s Included

• Nidek ARK-560A autorefractor keratometer unit
• Power cable
• 90-day Digital Eye Center warranty

Condition & Warranty

Used. This Nidek ARK-560A has been inspected, tested, and confirmed fully operational. The unit shows cosmetic wear consistent with prior clinical use. No chin rest or dust cover included — power cable only. Covered by a 90-day warranty on parts and workmanship.

Nidek ARK-560A Autorefractor Keratometer Used — The Only ARK Model with Visual Acuity Measurement

The Nidek ARK-560A autorefractor keratometer is the flagship of Nidek’s compact ARK series and the only model in the line that integrates Visual Acuity (VA) measurement alongside objective autorefraction and keratometry — giving clinicians unaided, glasses-corrected, and AR-corrected vision comparison on a single instrument without moving to a separate chart. The Nidek ARK-560A combines Nidek’s Pupil Zone Imaging Method, SLD light source, and 3D auto tracking to deliver measurements in approximately 0.3 seconds per eye — with reliable accuracy in challenging eyes including dense cataracts, IOL implants, and miotic pupils down to 2.0 mm. This used Nidek ARK-560A autorefractor keratometer is function-verified and ready for immediate clinical deployment.

Clinical research published by the National Library of Medicine confirms that objective autorefractometry provides repeatable refraction data that supports more accurate manifest refraction starting points and reduces chair time — with clinical evaluations demonstrating strong agreement between high-quality autorefractors and subjective refraction across a broad range of refractive errors.

Why Practices Choose the Nidek ARK-560A

• Visual Acuity (VA) measurement — exclusive to the ARK-560A — the only instrument in Nidek’s ARK series with built-in VA testing; compare unaided, glasses-corrected, and AR-corrected vision on-screen without a separate chart setup, saving time in high-volume exam lanes.
• Pupil Zone Imaging Method — analyzes a wider retinal area (up to ø4 mm) than single-point measurement systems, producing refraction readings that correlate more closely with manifest refraction in challenging eyes including dense cataracts and IOL implants.
• SLD (Super Luminescent Diode) technology — delivers sharper, cleaner retinal imaging than standard LED-based autorefractors; improves objective refraction quality in media-opacity cases.
• 0.3-second measurement time per eye — 3D Auto Tracking (X/Y/Z) with Auto Shooting triggers capture the moment alignment is optimal; hands-free capture reduces technician workload and patient fatigue across high-volume sessions.
• 2.0 mm minimum pupil diameter — reliable objective refraction and keratometry on miotic patients, post-surgical eyes, and pediatric patients where dilation is limited or contraindicated.
• Dual keratometry rings — standard ø3.3 mm mire ring for central corneal curvature plus 4-point peripheral ø6 mm measurement for comprehensive anterior corneal surface data used in contact lens fitting and pre-op planning.
• 5.7-inch tiltable color LCD with recall function — large, clearly readable display that tilts for standing operators; recall function allows side-by-side comparison of current and previous measurements at the instrument.
• Motorized chinrest with built-in thermal printer — smooth patient positioning via buttons; auto-cut thermal printer outputs refraction, keratometry, and VA results instantly without manual data entry.

Clinical Applications

• Pre-exam objective refraction with VA check — the ARK-560A’s VA measurement capability means technicians can record unaided VA and objective refraction in a single instrument pass, eliminating the need for a separate chart station during pre-exam workup.
• Cataract pre- and post-operative screening — Pupil Zone Imaging and SLD technology ensure reliable objective refraction in eyes with dense nuclear cataracts pre-op and IOL implants post-op; VA measurement tracks functional recovery at the same station.
• Contact lens fitting and evaluation — dual-ring keratometry (ø3.3 mm central + ø6 mm peripheral 4-point) provides the corneal curvature data required for soft, RGP, and orthokeratology lens design.
• Pediatric and miotic eye screening — 2.0 mm minimum pupil allows objective refraction in young children and patients where pharmacological dilation is not possible or practical.
• High-volume spectacle prescription workflow — 0.3-second auto-shoot measurement with integrated VA comparison reduces subjective refraction chair time and improves manifest refraction starting-point accuracy.

Who This Is For

• High-volume optometry clinics — VA measurement integrated into the AR workflow eliminates chart repositioning between tests; 3D auto tracking and auto shooting reduce per-patient technician time in multi-lane practices running at full throughput.
• Ophthalmology practices — Pupil Zone Imaging and SLD technology address the full clinical spectrum of post-op, cataract, and IOL patients; VA measurement supports post-surgical functional outcome tracking without a separate acuity instrument.
• Contact lens specialty practices — dual-ring keratometry provides central and peripheral corneal curvature data for specialty lens fitting without a separate keratometer.
• Practices replacing aging autorefractors — the ARK-560A’s VA capability upgrades the pre-exam station from refraction-only to refraction + acuity in a single footprint, with no additional instrument purchase.
• Pediatric eye care settings — 2.0 mm minimum pupil and compact tabletop design suit pediatric workflows where cooperation is limited and speed matters.

Technical Specifications

Compare Autorefractor Keratometer Options

For the widest measurement range without VA, see the Nidek ARK-500A autorefractor keratometer. For a brand-new unit with a full 1-year warranty, the Hans Heiss HRK-9900 delivers wavefront-guided refraction at a competitive price point.

Questions about the Nidek ARK-560A autorefractor keratometer? Contact us.