The Marco ARK-1a is a multimodality device that includes autorefraction and keratometry. This automated instrument measures with objective accuracy and features accommodation testing and retro-illumination. The accommodation helps to detect early presbyopia, latent hyperopia and children with reading difficulty. The retro-illumination benefits patient’s in viewing and understanding their cataracts. Super luminescent diode (SLD) makes it possible to accurately measure patients with cataracts, corneal opacities, IOLs, and post LASIK procedures. It also utilizes a multiple pupil zone imaging method combined with rotary prism technology, and auto alignment EyeTracking System on the X-Y-Z axes ensuring 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
- 6.5″ high-quality, full-color LCD screen
- High speed printer
Super Luminescent Diode (SLD)
Super Luminescent Diode is an edge-emitting semiconductor light source based on super luminescence. It uses the high power and brightness of laser diodes providing a sharper image compared to LED. It allows for quick and accurate measurements of patients with cataracts, corneal opacities, IOL’s, and post LASIK.
Confidence Index Indicator
The confidence index indicator helps to clarify the reliability of the data obtained by the ARK-1a. The confidence index number can range from 3 to 9 and gives the operator an indication of the clarity and quality of the ocular media. A value near 9 means the data is very repeatable and consistent. Values of 6 or below indicate media opacity or highly irregular optics.
The Eye Tracking System
The Eye Tracking System provides X, Y, Z axes tracking for superior alignment and focusing. The ARK-1a automatically initiates measurement at the optimal alignment.
Accomodation
Accommodation testing helps to detect early presbyopia, latent hyperopia, and children with reading difficulty.
Dual Zone
Exclusive dual zone refractive measurement utilizing double-ring technology to measure two pupil zones supplies information based on pupil size and provides more robust objective data as a starting point for subjective refractions.
Retro Illumination
The ARK-1a Autrefractor & Keratometer features retro illumination which illustrates media opacity in both the cornea and lens.
SPECIFICATIONS
| 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 |
| 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) |
| Pupil Size Measurement |
1.0 to 10.0 mm (0.1 mm increments) |
| Accommodation 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 |
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