Marco ARK-1s Autorefractor & Keratometer

Brand: Marco


The Marco ARK-1s offers autorefraction, keratometry, and glare testing all in one compact device.

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The Marco ARK-1s is a multimodality device that includes autorefraction/keratometry/glare testing combinations. 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 patients 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 Eye Tracking 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-1s 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

Glare Testing: Simulates real life glare situations to evaluate your patients media opacities including cataracts.

Super Luminescent Diode: It 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


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