Fully-Automated Kerato-Refractometer

The Next Generation of Refractive Care

The KR-1 Auto Kerato-Refractometer is quick, reliable and easy to use with fully-automated operation. It features Topcon’s patented Rotary Prism technology for highly accurate results. Its 360° rotatable touchscreen control panel allows the instrument to be installed in many different exam room configurations. All operating procedures can be performed with the touchscreen control panel.

Watch this quick KR-1 demo


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Comparison chart of Topcon Autorefractors

Technology that helps you save time and elevate the patient experience.

Key features

  • 70+ YEARS OF REFRACTOMETERS – With over 70 years of experience designing and manufacturing high-performance refractometers, Topcon has developed the KR-1 with ease of use, flexibility, and reliability as core features.
  • EASY-TO-USE – Color touchscreen display and fully automated operation.
  • FLEXIBLE, SPACE-SAVING LAYOUT – 360° rotatable control panel enables the KR-1 to be installed in many different exam room configurations.
  • RELIABLE MEASUREMENT – Topcon’s Rotary Prism technology provides accurate, repeatable results.
  • EMR CONNECTIVITY – Easily transport data across USB or LAN export for fast EMR connectivity.

Refractive Power Measurements

Spherical refractive power: -25D to +22D (0.12D/0.25D steps)
Cylindrical refractive power: OD to ±lOD (0.12D/0.25D steps)
Astigmatic axial angle: 0° to 180° (1°/ 5°steps)
Minimal measurable pupil diameter: Ø 2.0mm

Corneal Curvature Measurements

Corneal curvature radius: 5.00mm to 10.00 mm (0.01mm step)
Corneal refractive power: 67.50D to 33.75D (0.12D/0.25D steps)
(corneal refractive index = 1.3375)
Corneal astigmatic refractive power: OD to ± lOD (0.12D/0.25D steps)
Corneal astigmatic axial angle: 0° to 180°(1°/ 5° steps)

PD Measurement Range

20mm to 85mm (1mm step)

Data Transport Terminal

USB (Import), RS-232C (Export), LAN (Export)


286~326m (W) X 445~526mm (D) X 466~615 mm (H)


19 kg

Power Supply

100-240V AC, 50-60Hz, 75VA

KR-1 Brochure

Refraction Solutions Brochure

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