
HandyRef-K Portable ARK
The HandyRef-K is a portable solution for accurate refraction and keratometry measurements anytime and anywhere. The HandyRef-K is lightweight and has excellent weight distribution.
HandyRef-K Portable ARK
The HandyRef-K is a portable solution for accurate refraction and keratometry measurements anytime and anywhere. The HandyRef-K is lightweight and has excellent weight distribution. Its compact design makes it easy to hold, balance, and use. The intelligently designed button layout is also useful in one-handed operation. For inexperienced patients like children, the newly added melody function can ease patient’s anxiety and draw attention. Data can be transferred quickly and easily to PC.
- Compact Form Factor
- Pupil Zone Imaging Method
- Super Luminescent Diode (SLD) & Highly Sensitive CCD
- SynchroScan Technology
- Full Graphic LCD with 3.5-inch Color Screen
- Achieve Precise Measurements Anytime, Anywhere.
- Cataract Measurement Mode
- Quick Measurement Mode
- Auto Measure
- Keratometry Measurement with Mire Ring
Objective Refractors /
HandyRef-K

3.5" Color Screen
New full graphic 3.5-inch color LCD is 40% larger than the previous model. Clear screen design and intuitive icons are user-friendly.
Pupil Imaging Method
The HandyRef-K analyzes a wide area (Max. 4 mm diameter) pupil zone, giving measurement data representing the refractive error of the patient’s system. Small pupils (Min. 2 mm diameter) can also be measured.
SynchroScan Technology
The HandyRef-K uses “SynchroScan Technology”: Measurements start when alignment is achieved, and data is captured when alignment becomes optimal. This provides a more stable, effective, and efficient measurement.
Lightweight Design
The HandyRef-K is lightweight with excellent weight distribution. Its compact design makes it easy to hold, balance, and use with either hand.
Achieve precise measurements anytime, anywhere with a compact body design that allows simple one hand, multi-position operation. The HandyRef-K will become a reliable partner you can always count on.
Full Graphic 3.5″ Color Screen
New full graphic 3.5-inch color LCD is 40% larger than the previous model. The clear screen design and intuitive icons provide high user-friendliness. An intelligently designed button layout is also useful in one-handed operation.


SynchroScan Technology
Measurements start when the alignment starts, and locks in the data when alignment becomes optimal as a measurement value. Accuracy is further enhanced with the pupil zone imaging method which analyzes a wide area (Max. 4mm diameter) pupil zone, giving measurement data representing the refractive error of the patient’s system.
SLD/CCD Imaging Technology
The HandyRef-K Portable Ark utilizes super luminescent diode (SLD) amp; a highly sensitive CCD. A Super luminescent diode (SLD) light source provides a sharper and better defined ring image compared to the conventional LED. The highly sensitive CCD camera detects the image even if the fundus reflection is weak due to media opacities.


Portable Base Unit
By using the portable stand, the HandyRef-K can be used as a desktop device. An integrated printer with auto cutter function is included. By using IR or wireless LAN (WLAN) connection, measurement data can be printed even if the main body and station are separated.
HandyRef-K Portable ARK Specs
Main Body
Auto refractometer Measurement Range Sphere | -20.00 to +20.00 D (VD = 12mm) (0.12 / 0.25 D increments) Cylinder 0 to 12.00 D (0.12 / 0.25 D increments) Axis 0 to 180° (1° / 5° increments) |
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Minimum measurable pupil diameter | ø2 mm |
Auto keratometer Measurement Range Curvature Radius | 5.00 to 13.00 mm (0.01 mm increments) |
Refractive Power | 25.96 to 67.50 D (0.12 / 0.25 D increments) |
Cylindrical Power | 0 to 12.00 D (0.12 / 0.25 D increments) |
Axis | 0 to 180º (1° / 5° increments) |
Sagittal Measurement | 25º each from the center (superior side, inferior side, temporal side, nasal side) |
Pupil Size Measurement Range | 1.0 to 10.0 mm (0.1 mm increments) |
Fixation Target | Scenery |
Display | 3.5-inch color LCD |
Interface | USB: 1 port Wireless LAN (WLAN): 1ch (Wireless LAN (WLAN)-equipped model only) |
Power Specification Battery Pack | Lithium-ion battery (7.2 V 1800 mAh) |
Station Feed | DC 9 V 2 A (maximum) |
Dimensions/Mass | 206 (W) × 181 (D) × 224 (H) mm (including occluders) / 998 g (including battery pack) 8.1 (W) x 7.1 (D) x 8.8 (H)” (including occluders) / 2.2 lbs. (including battery pack) |
Station
Printer | Thermal line printer with easy loading and auto cutter (printer-equipped model only) |
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Interface | USB: 1 port, LAN: 1 port, RS-232C: 1 port (printer-equipped model only) |
Battery Charging Battery Pack | Lithium-ion battery (7.2 V 1800 mAh) |
Charging | When inserted in the main body: Approx. 180 min. (when the main body is placed on the station) When inserted in the battery slot: Approx. 140 min. |
Power Supply | AC 100 to 240 V, 50 / 60 Hz |
Power Consumption | 60 VA |
Dimensions/Mass | 224 (W) x 283 (D) x 147 (H) mm / 2.7 kg (printer-equipped model), 2.5 kg (model without printer) 8.8 (W) x 11.1 (D) x 5.8 (H)” / 5.9 lbs. (printer-equipped model), 5.5 lbs. (model without printer) |
Accessories
Standard Accessories | 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 |
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Optional Accessories | Carrying case, Carrying case with portable stand, Barcode scanner, Magnetic card reader, EyeCa-RW2, Eye Care card, Communication cable, Battery pack, USB flash drive |
The HandyRef-K uses “SynchroScan Technology”: Measurements start when alignment is achieved, and data is captured when alignment becomes optimal. This provides a more stable, effective, and efficient measurement.
HANDYREF-K IN PUBLICATIONS
PRESS RELEASES
HandyRef-K Portable ARK
