Marco ARK-1a Autorefractor & Keratometer

Brand: Marco


The Marco ARK-1a Autorefractor and Keratometer delivers automated technology for rapid testing, controlled for accommodation, and a precise way to measure small and large pupils.

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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.


Tilt LCD Screen: Tiltable 6.5″ high quality full color LCD screen

High Speed Printer: Measurement values are printed out using a high-speed printer. Contact lens data can be included, as can eyeprint illustrations to aid in explaining myopia, hyperopia, or astigmatism to the patient.

User Friendly Features: The ARK-1a delivers the best combination of automated technology today for rapid testing, controlled for accommodation and a precise way to measure small and large pupils especially on eyes with media opacities

Super Luminescent Diode: Uses the high power and brightness of laser diodes providing a sharper image compared to LED. This measures patients, quickly and accurately, with cataracts, corneal opacities, IOL’s, and post LASIK

Retro Illumination: The ARK-1a Autrefractor/Keratometer features retro-illumination which illustrates media opacity in both the cornea and lens.


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