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view of the Retinomax k screeen with the screen unfolded and turned on
view of Retinomax k screeen in use with child mode
view of a 90° Retinomax k screeen on a patient
view from the left side of the Retinomax k screeen
view of the Retinomax k screeen on is base
view of the Retinomax k screeen from the patient side with child mode

Retinomax K+Screeen

Handheld Auto Refractometer Keratomer with tilting screen

Retinomax products offer a wide range of refraction and keratometry measurements with high mobility, stability and accuracy, that have been recognized worldwide for years.

Automatic axis compensation and extended measurement range

Not only does the device let the examiner know the cylinder axis angle, but it also adjusts automatically if it is not level. Regardless of the inclination of the device, the internal gyroscope gives the degree of inclination generated. The measuring range has also been extended.

Fast and reliable measurement

The Retinomax K+Screeen has an acquisition time of only 0.124 seconds per measurement, ensuring you a quick and precise result. The measurement process automatically repeats if the data is not stable, guaranteeing you a reliable outcome.

Small pupils

The fixation intensity is automatically lowered for small pupils. The minimum pupil size for measurement is 2.3mm. If a pupil is smaller than 3.0 mm, the fixation target intensity will automatically be reduced by about 45% to avoid pupil contraction.

New child mode

While the measurement is being taken, a melody continually plays to keep children’s attention.  A constantly changing color display, both on the outside and inside of the device, also keeps children involved during the process.

Upward-tilting LCD

The low-reflection 3.5 inch monitor, featuring a tilting screen with a 100 degree seamless range of motion allows both new as well as existing Retinomax users to easily adapt to Retinomax Screeen’s user-friendly design.

Technical Specifications


  • WIDTH: 168 mm
  • DEPTH: 202 mm
  • HEIGHT: 236 mm
  • WEIGHT: 960 g (without battery) 970 g (with battery)


Refractometry Measurement range

  • Spherical (S+C) -20D to +23D (VD=12mm) (AUTO/0.12/0.25D steps)
  • Cylinder 0 to +/-12D (AUTO/0.12/0.25D steps)
  • Pupil measurement 2.0 to 12.0 mm (in 0.1 mm increment)

Measurement of radius of curvature

  • Radius of curvature 5.00 to 15.00mm (in 0.01mm increment)
  • Corneal astigmatism 0D to +/-12D (R 5 mm to 13 mm) 0D to +/-7D (R 14 mm to 15 mm)
  • Center ø 3.2 mm (R 8 mm)
  • Pupil measure 2.0 to 12.0 mm (in 0.1 mm increment)

Additional products

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