NIDEK ARK-1s Autorefractor & Keratometer
$7,500.00
The ARK-1s helps you quickly assess and document vision loss in your patients. It is one of the first autorefractor/keratometers that has glare testing available.
NIDEK ARK-1s Autorefractor & Keratometer
NIDEK ARK-1s Autorefractor & Keratometer is a multimodality device that includes autorefraction and keratometry plus glare testing. This automated instrument measures with objective accuracy and features accommodation testing and retro illumination. Super Luminescent Diode (SLD) technology makes it possible to accurately measure patients with cataracts, corneal opacities, IOLs, and post LASIK procedures. The ARK-1s also utilizes a multiple pupil zone imaging method combined with rotary prism technology and an auto alignment Eye Tracking System to ensure consistent, accurate, reliable and repeatable data.
Features:
- Super Luminescent Diode (SLD) for sharper images compared to LED
- Accurate data even through many cataracts
- Eye Tracking system provides X-Y-Z tracking for superior alignment and focus
- Large pupil zone imaging method (up to 6mm diameter)
- Accommodation measurement
- Keratometry measurement with mire ring to reduce eyelid artifacts
- Retro illumination illustrates media opacity in both the cornea and lens
- Low contrast testing
- Visual acuity measurement with glare testing
- Subjective spherical refinement
- Near vision testing
- 6.5″ high-quality, full-color LCD screen
- High speed printer
Technical Details
| Objective Spherical Refractive Error | -30.00 to +25.00 D (VD = 12 mm) (0.01/0.12/0.25 D increments) |
|---|---|
| Cylindrical Refractive Error | 0 to ±12.00 D (0.01/0.12/0.25 D increments) |
| Cylinder Axis | 0 to 180° (1°/5° increments) |
| Minimum Measurable Pupil Diameter | ø2 mm |
| Subjective Visual Acuity Measurements | <0.1 / 0.1 / 0.25 / 0.32 / 0.4 / 0.5 / 0.63 / 0.8 / 1.0 / 1.25 <20/200 / 20/200 / 20/80 / 20/60 / 20/50 / 20/40 / 20/30 / 20/25 / 20/20 / 20/16 |
| Spherical Refractive Error | -20.00 to +20.00 D (VD = 12 mm) (0.25 D increments) |
| Cylindrical Refractive Error | 0 to ±8.00 D (Max.) (0.25 D increments) |
| Cylinder Axis | 0 to 180° (1°/5° increments) |
| Near Addition Power | 0 to +9.75 D (0.25 D increments) |
| Corneal Curvature Radius | 5.00 to 13.00 mm (0.01 mm increments) |
| Corneal Refractive Power | 25.96 to 67.50 D (n = 1.3375) (0.01/0.12/0.25 D increments) |
| Corneal Cylindrical Power | 0 to ±12.00 D (0.01/0.12/0.25 D increments) |
| Corneal Cylinder Axis | 0 to 180° (1°/5° increments) |
| Pupillary Distance Measurement | 30 to 85 mm (1 mm increments) |
| Corneal Size Measurement | 10.0 to 14.0 mm (0.1 mm increments)Fixation TargetN/A |
| Pupil Size Measurement | 1.0 to 10.0 mm (0.1 mm increments) |
| Accomodation Measurement | 0 to 10.00 D (0.01/0.12/0.25 D increments) |
| Observation/Display Method | 6.5-inch color LCD |
| Printer | Thermal line printer with auto cutter |
| Interface Connectors | RS-232C: Two ports USB: One port LAN: One port |
Power
| Power Supply | AC 100 to 240 V ±10% 50/60 Hz |
|---|---|
| Power Consumption | 100 VA |
Dimensions
| Measurements | 260 (W) mm 495 (D) mm 457 (H) mm |
|---|---|
| Mass | 20 kg |
Subjective Assessment With Low Contrast and Glare Testing
Objective refractions can be refined subjectively and then quality of vision can be assessed with a low contrast chart. A glare test can be performed and the patient’s VA measured.
Accommodation Measurement with Artificial Intelligence Algorithm
Objective measurement of accommodation is performed with patient’s focusing on a target which moves from distance to near. The artificial intelligence algorithm detects the patient’s response and reduces the measurement time in cases with a slow or weak accommodative response.
Simple Opacity Assessment with Retroillumination Imaging
The retro illumination image enables the observation of opacity of the optical media of the eye. NIDEK cataract indices indicate the severity of the opacity and helps to assess the progression of pathology.
Automatic Pupil Size Measurement
As a new function that adds no time to the measurement process, the pupil size is measured during the refraction and this measurement is presented on the printout.
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