Topcon KR-800S Auto Kerato-Refractometer

Brand: Topcon


The Topcon KR-800S Auto Kerato-Refractometer features Topcon's Rotary Prism technology for unparalleled accuracy and reliability.

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The 5-in-1 KR-800S Auto Kerato-Refractometer incorporates Topcon’s Rotary Prism technology for unparalleled accuracy and consistent measurements. It features several tests, including a visual acuity (VA) check for near and far distance, contrast sensitivity testing, grid testing and glare testing. The glare testing function provided by the KR-800S can aid in the screening of cataracts, as well as confirm the objective and subjective VA under glare conditions before and after cataract surgery. The compact and user-friendly design provides quick and accurate readings with minimal training required. Also known as: KR800S, KR-800 S, KR 800S, and KR 800 S.


  • Accurate objective measurement (REF, KRT, R/K)
  • The unique Rotary Prism Technology allows for measurement of an area of the retina while permitting measurements through pupils as small as 2mm in diameter
  • Confirm objective and subjective visual acuity under glare conditions before cataract surgery
  • Easy-to-use, fast measurements
  • Compact, user-friendly design with wide 8.5 inch color touchscreen display
  • Contrast sensitivity testing
  • Grid chart test
  • Easy load printer

5-in-1 Auto Kerato-Refractometer

  1. Accurate objective measurement (REF, KRT, R/K)
  2. Subjective VA measurement for far and near distance
  3. Glare test
  4. Grid test
  5. Contrast test


Objective Refractometer Mode – Sphere Range  -25 to +22D (0.12D/0.25D steps) *1
Cylinder Range  0D to 10D (0.12D/0.25D steps) *1
Axis Range  0°to 180° (1°/5° steps)
Minimum Measurable Pupil Diameter  2mm
Corneal Curvature Mode – Corneal Curvature Radius  5.00mm to 10.00mm (0.01mm display unit)
Corneal Refraction  67.50D to 33.75D(0.12D/0.25D steps)
Refraction Index  1.3375
Corneal Astigmatism  0D to 10D (0.12D/0.25D steps)
Corneal Astigmatism Axial Angle  0 to 180° (1°/5° steps)
Subjective Measurement Mode – Sphere Range  -18 to +18D (0.25D steps) *2
Cylinder Range  0D to 8D (0.25D steps) *2
Axis Range  0°to 180° (1°/5° steps)
PD Measurement Range  20-85mm (0.5mm display unit)
Input/Output USB(for Import), RS-232C(for Export), LAN(for Export)
Dimensions 317-341mm(W) × 521-538mm(D) × 447-477mm(H)
Weight 16kg
Power Supply  100-240V AC, 50-60Hz