The Grand Seiko GR-3300K traditional autorefractor is a cost-effective alternative to the GR-3500KA for those who do not need the GR-3500KA's Autofocus/Autotrack/Autostart abilities.

Their accuracy and reliability are identical, representing an excellent value without breaking the bank.

gr 3300k autorefractor keratometerFeatures Include:

  • Color LCD Display to make alignment easier
  • Icon based screen to make it more user friendly
  • Auto Start - Once focused properly measurement occurs automatically. After measuring both eyes printing starts immediately.
  • Printer with Automatic Cutter
  • RS-232C Interface to allow data to be transfered to a PC
  • Measurement of Tonic Accommodation
  • Relax Function to reduce the margin of measurement error
  • Measurement of Corneal Peripheral
  • Measures to a 2.3mm pupil diameter
  • Motorized Chin Rest




Refraction Measurement Sphere -30~+22D (0.01/0.12/0.25DStep)
Cylinder 0~+10D (0.01/0.12/0.25DStep)
Axis angle 0~180 (1 Step)
Measurement of
Corneal Radius
Corneal radius 5.0~10.0mm (0.01mmStep)
Refractive power 33.75~67.5D(0.01/0.12/0.25DStep)
Cylindrical power 0~+9D
Axis angle 0~180 (1 Step)
Corneal Measurement Center 3.5mm Peripheral 6.5mm
Vertex Distance 0, 10, 12, 13.5, 15mm
Minimal Pupil Diameter    2.2mm
Pupillary Distance Measurement Range 85mm (1mm Step)
Printer Thermal printer w/ Automatic Cutter (Width 57mm)
Internal Monitor 5.6 inch LCD Display (Color)
Moveable Distance Back/Force + 17mm Right/Left +43mm Up/Down +17mm
Moveable Distance of Chinrest +30mm
Overall Dimension (W) 260mm x (D) 465mm x (H) 463mm
Weight About 19.5kg
Output RS232C Interface; USB
Rated Voltage 100~240V ; 50/60 Hz
Consumption 90VA
Power Save OFF, 3, 5, 10min. (Selectable)







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