The NIDEK HandyRef-K handheld autorefractometer and keratometer deliver precise, reliable measurements anytime, anywhere. Its lightweight, well-balanced body minimizes hand fatigue, while the ergonomic design ensures easy operation—even with one hand.
A 3.5-inch color LCD provides clear visuals and intuitive data reading, while SynchroScan technology automatically captures measurements at the optimal moment for maximum accuracy. The HandyRef-K combines both refraction and keratometry functions, allowing comprehensive assessment of refractive errors and corneal curvature.
It performs equally well in clinics and field examinations, maintaining accuracy even with pupils as small as 2 mm. With automatic measurement, data storage, and the comforting “Melody” function, this compact instrument ensures efficiency, comfort, and precision for every practitioner.
Nidek HandyRef-K Features:
- Handheld Measurements Anywhere – The Nidek HandyRef-K is purpose-built for optometrists who need portable, accurate refraction and keratometry. Its lightweight, well-balanced design and intuitive button layout support comfortable one-handed operation in any clinical setting or outreach scenario.
- Large 3.5″ Color LCD – The HandyRef-K features a crisp, full-graphic display that’s 40% larger than previous models, making data review and operation easier for optometrists and staff.
- Supine Position Mode – Automatically activates when the device tilts 60° or more downward, enabling accurate measurements for non-ambulatory or surgical patients in optometry clinics or hospital settings.
- Melody Function – Plays a gentle melody to help ease anxiety and engage children or nervous patients, making exams smoother for optometrists.
- Pupil Zone Imaging – Analyzes a wide pupil area (up to 4 mm) for more accurate measurements that closely match subjective refraction, supporting reliable pre-testing by optometrists.
- SynchroScan Technology – Measurements begin with alignment and automatically lock in at optimal alignment, reducing motion-related errors and improving accuracy during handheld use by optometrists.
- Auto Shot Mode – Captures data automatically at optimal alignment; if the data is unstable, additional measurements are taken to ensure reliable results for optometry practices.
Why Practices Choose the Nidek HandyRef-K
- SynchroScan Technology – Captures measurements at the peak of alignment, not at operator trigger, dramatically reducing errors and improving handheld results in optometry clinics.
- 2.0 mm Minimum Pupil – Accurately measures refraction and keratometry even through small, miotic, pediatric, or poorly dilating pupils—expanding optometric diagnostic capability.
- Wide Measurement Range – Sphere −20.00 D to +20.00 D and keratometry 5.00–13.00 mm cover the full spectrum of refractive and corneal conditions seen in optometry practice.
- Auto-Fogging Fixation Target – Automatically controls accommodation, improving the objectivity of refraction tests—even when patient cooperation is limited in the clinic or the field.
- Supine Position Mode – Enables accurate measurements for non-ambulatory patients or those in surgical or hospital settings when the device is tilted downward.
- Docking Station with Thermal Printer – Securely charges the battery and instantly prints patient data from memory, streamlining workflow and recordkeeping in optometry clinics.
- 50-Patient On-Device Memory – Stores up to 100 eye records, making it easy for optometrists to batch retrieve and print data after mobile screening sessions.
- Hardshell Carrying Case – Protects the HandyRef-K and accessories during transport, perfect for optometrists serving satellite clinics or fieldwork environments.
Clinical Applications
- Pediatric Vision Screening — Handheld operation and rapid SynchroScan capture are ideal for non-cooperative young patients who cannot remain still at a conventional chin rest.
- Mobile and Community Screenings — Compact, battery-powered design travels to schools, nursing homes, humanitarian missions, and rural outreach events with ease.
- Bedside and Surgical Suite Use — Supine position mode delivers accurate pre- and post-operative refractive and keratometry data at the bedside or in the OR without moving the patient.
- Keratometry for Contact Lens Fitting — Full corneal curvature data (5.00–13.00 mm) supports contact lens selection and fitting wherever the examination occurs.
- Multi-Site Practice Efficiency — One portable unit covers multiple satellite locations, reducing capital outlay while maintaining consistent diagnostic capability across sites.
Who This Is For
- Pediatric Ophthalmology and Optometry Practices requiring a fast, non-intimidating handheld instrument for young or non-cooperative patients.
- Multi-Location and Mobile Practices that need a reliable handheld ARK to serve satellite clinics and outreach programs.
- Hospital Ophthalmology Departments performing bedside consultations, OR measurements, or assessments of non-ambulatory patients.
- Humanitarian and Global Health Programs conducting refractive screenings in low-resource or field settings where portability is essential.
Technical Details
- Automatic refractometer
- Sphere: -20.00 to +20.00 D (VD = 12 mm), in increments of 0.12 / 0.25 D
- Cylinder: 0 to ±12.00 D, in increments of 0.12 / 0.25 D
- Axis: 0 to 180°, in increments of 1° / 5°
- Minimum pupil diameter: Ø 2 mm
- Measurement method: Pupil Zone Imaging
- Capture technology: Auto Shot + SynchroScan
- Automatic keratometer (integrated only in HandyRef-K)
- Curvature radius: 5.00 to 13.00 mm, in increments of 0.01 mm
- Refractive power: 25.96 to 67.50 D, in increments of 0.12 / 0.25 D
- Cylinder: 0 to ±12.00 D
- Axis: 0 to 180°, in increments of 1° / 5°
- Sagittal zone: ±25° from the centre (upper, lower, temporal, nasal)
- Measurable pupil size: 1.0 to 10.0 mm, in increments of 0.1 mm
- Rigid lens measurement: possible with dedicated support (soft lenses not compatible)
- Display & user interface
- Screen: 3.5-inch colour graphic LCD
- Fixation target: “landscape” or “child” target (factory-set)
- Focus indicator: yes
- Automatic axis correction: yes (can be enabled in settings)
- Automatic right/left eye detection: yes
- Reclining patient mode: yes (automatic 90° axis compensation)
- Backlight: yes
- Storage: 50 patients / 100 eyes
- Examination summary: display of all data on a single screen
- Melody function: to reassure children
- Connectivity
- USB: 1 port (on the main unit and station)
- LAN: 1 port (on the station)
- RS-232C: 1 port (on the station)
- WLAN: 1 channel (if equipped)
- Data transfer: to computer or Nidek systems via LAN/WLAN or USB
- Station with printer
- Printer type: easy-load thermal printer with auto cutter
- Wireless connection: printing possible via WLAN or infrared, even separately from the station
- Station power supply: 100 to 240 V AC, 50/60 Hz
- Power consumption: 60 VA
- Station dimensions: 224 (W) × 283 (D) × 147 (H) mm
- Station weight: 2.7 kg (with printer)
- Battery & power supply
- Battery: lithium-ion 7.2 V / 1800 mAh
- Battery life:
- In the main unit (on the station): approx. 180 minutes
- In battery compartment only: approx. 140 minutes
- External power supply for the unit: DC 9 V / 2 A (max)
- Dimensions of the HandyRef-K unit: 206 (W) × 181 (D) × 224 (H) mm (with occluders)
- Weight: 998 g (with battery)
Compatible Accessories
- Printer paper (if printer version)
- Magnetic occluder
- Neck strap
- Protective cover
- Spherical eye model
- Contact lens holder (rigid)
Includes:
- Nidek HandyRef-K Handheld Unit
- Nidek Docking Station (with integrated thermal printer)
- Hardshell Carrying Case
- Power cable
- – Occluder (2 units)
- – Neck strap
- – Printer paper (3 rolls / printer-equipped model only)
- – Power cord
- – Connection cable
- – Battery pack
- – Dust cover
- – Spherical model eye
- – Contact lens holder
- – Portable stand
- – Carrying case
- 90-day warranty
Reference
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