Nidek ARK-1e – Autorefractor Keratometer – Used

Description

What’s Included

• Nidek ARK-1e auto ref/keratometer (main unit)
• Power cable
• 90-day Digital Eye Center warranty

Condition & Warranty

Used. This Nidek ARK-1e has been tested, is in excellent working order and has been cleaned. It shows some signs of usage, and the forehead band is missing (shown in the product photos). Covered by a 90-day warranty on parts and workmanship.

Nidek ARK-1e — Used Auto Ref/Keratometer from the Nidek ARK-1 Series

The Nidek ARK-1e is a tabletop auto ref/keratometer built on the Nidek ARK-1 platform, combining objective refraction and corneal keratometry in one compact unit. The Nidek ARK-1 series uses a large pupil zone imaging method that measures refraction across a wide area up to 6 mm in diameter and a central area up to 3.5 mm, so the operator can see how pupil size affects the patient’s correction. A super luminescent diode and a high-sensitivity CCD keep the ring image readable even when the fundus reflex is weak, such as in eyes with cataract. Auto tracking and auto shot start the measurement as soon as alignment is correct, which keeps pre-testing fast and consistent from one technician to the next.

The National Library of Medicine indexes a clinical study in Optometry and Vision Science (2019) that evaluated the accuracy of the Nidek ARK-1 autorefractor against subjective refraction.

Why Practices Choose the Nidek ARK-1e

• Large pupil zone refraction — wide-area (up to ø6 mm) and central-area (up to ø3.5 mm) readings help explain night-vision complaints and pupil-dependent refractive shifts.
• Wide measuring range — sphere from −30.00 to +25.00 D and cylinder up to ±12.00 D, with a minimum measurable pupil of just 2 mm.
• Mire-ring keratometry — corneal radius from 5.00 to 13.00 mm and corneal cylinder up to ±12.00 D, measured with a mire ring that reduces eyelid artifacts.
• SLD light source — a super luminescent diode with a sensitive CCD improves measurement capability in dense cataract and small-pupil eyes.
• Auto tracking and auto shot — measurement fires automatically once alignment is achieved, reducing chair time and operator variability.
• Tiltable 6.5-inch color LCD — easy to read and operate whether the technician is seated or standing.
• Built-in printer and data ports — thermal printer with auto cutter, plus RS-232C, USB and LAN for sending results to compatible NIDEK refraction systems.

Clinical Applications

• Objective pre-test refraction — a reliable starting point for subjective refraction in the exam lane.
• Keratometry for contact lens fitting — K readings and corneal cylinder for soft and RGP lens selection.
• Cataract patient screening — SLD imaging helps obtain readings through media opacities, and K values support pre-operative workups.
• Pupil-related vision complaints — comparing wide-area and central-area refraction helps assess dim-light and night-vision symptoms.
• PD and corneal size measurement — pupillary distance, corneal diameter and pupil size captured during the same sitting.

Who This Is For

• Optometry practices that want a full auto ref/keratometer for the pre-test room at used pricing.
• Ophthalmology clinics seeing cataract patients who need dependable readings through media opacity.
• High-volume and technician-driven clinics that rely on auto shot for consistent pre-testing.
• Contact lens practices that need keratometry alongside refraction in one instrument.

Technical Specifications

Compare Nidek ARK-1 and Other Autorefractor Keratometers

Need tonometry in the same footprint? The Nidek Tonoref II adds non-contact tonometry to auto refraction and keratometry. To complete the refraction lane, pair the ARK-1e with the Nidek LM-1800PD auto lensmeter.

Questions about the Nidek ARK-1e? Contact us for availability and shipping details.