Description
What’s Included
- Topcon KR-8900 autorefractor keratometer
- Power cable
- Note: no other accessories included
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. This Topcon KR-8900 autorefractor keratometer has been tested and is in excellent working order. The unit shows some signs of usage as expected for used equipment. Comes with power cable only. Carefully tested before shipping. Covered by a 90-day warranty on parts and workmanship.
Topcon KR-8900 Autorefractor Keratometer — Used with Rotary Prism Technology
The Topcon KR-8900 autorefractor keratometer combines automated objective refraction and keratometry in a compact tabletop unit featuring Topcon’s exclusive Rotary Prism Technology — a measurement method that samples a wider retinal area than conventional infrared systems, delivering reliable sphere, cylinder, and axis readings even through pupils as small as 2.0 mm. The Topcon KR-8900 also includes corneal diameter measurement, a feature exclusive to the KR-8900 within the Topcon autorefractor line, making it a strong choice for contact lens fitting and pre-surgical evaluation. With simultaneous right/left display, 5 built-in print formats, and RS-232C / USB connectivity, this used Topcon KR-8900 autorefractor keratometer is a practical, well-supported instrument for high-volume optometry and ophthalmology practices.
Research published in the National Library of Medicine confirms that table-mounted autorefractors deliver objective refraction measurements in strong agreement with subjective refraction in adults, supporting their established role as the standard starting point for the comprehensive eye examination.
Why Practices Choose the Topcon KR-8900
- Rotary Prism Technology — Topcon’s exclusive measurement approach samples a wider retinal area than conventional autorefractors, delivering consistent readings even in difficult cases including small pupils, dense media, and post-surgical eyes
- 2.0 mm minimum pupil — captures reliable refraction and keratometry through miotic, post-surgical, and pediatric pupils where other instruments may fail or require pupil dilation
- Corneal diameter measurement — exclusive within the Topcon KR-series, enabling on-instrument measurement of corneal diameter for contact lens fitting without a separate instrument
- Simultaneous R/L display — both eyes shown on screen at the same time for immediate comparison, reducing the time between measurements and speeding up the preliminary exam
- Auto-fogging fixation target — scenic fixation target minimizes accommodation during measurement for more accurate objective refraction results
- 5 print format options — ALL, AVE, GRAPHIC, SIM, and CUSTOM output via built-in thermal printer; no external printer required
- RS-232C and USB 1.1 output — connects to EMR systems, Topcon phoropters, and practice management platforms for electronic data transfer
- Compact tabletop design — smaller optical head than older KR-series instruments with ergonomically positioned screen; fits tight exam lanes and satellite offices
Clinical Applications
- Automated objective refraction as the starting point for subjective manifest refraction in routine eye exams
- Keratometry for contact lens fitting including soft, RGP, and specialty lenses, with corneal diameter measurement built in
- Pre-cataract keratometry for IOL power calculation through 2.0 mm pupils
- Post-surgical refraction monitoring where pupil size or media clarity limits other instruments
- High-volume screening workflows where fast simultaneous R/L display reduces per-patient measurement time
Who This Is For
- Ophthalmology and optometry practices seeking a used Topcon autorefractor with proven Rotary Prism accuracy at a cost-effective price
- Surgical centers needing keratometry through small pupils for cataract and refractive surgery pre-op workups
- Contact lens specialty practices that need corneal diameter measurement built into the autorefractor
- Multi-location groups adding a second ARK to a satellite office without the cost of new equipment
Technical Specifications
| Specification | Detail |
| Model | Topcon KR-8900 |
| Type | Autorefractor / Keratometer |
| Technology | Rotary Prism Technology (Topcon exclusive) |
| Sphere Range | −25D to +22D (0.12D / 0.25D step) |
| Cylinder Range | 0 to ±10D (0.12D / 0.25D step) |
| Axis Range | 0°–180° (1° or 5° step) |
| Minimum Pupil | 2.0 mm |
| Keratometry Range | 5.0–10.0 mm radius (33.75–67.5D) |
| PD Measurement | 20–85 mm (1 mm step) |
| Print Formats | ALL, AVE, GRAPHIC, SIM, CUSTOM |
| Data Output | RS-232C, USB 1.1 |
| Dimensions | 288 × 509 × 432–462 mm |
| Weight | 19.6 kg |
| Power | 100–240V AC, 50/60 Hz, 75 VA |
| Condition | Used |
| Warranty | 90-day Digital Eye Center warranty |
Compare Topcon Autorefractor Options
| Feature | Topcon KR-8900 | Topcon KR-8800 | Topcon KR-8000 |
| Rotary Prism | Yes | Yes | Yes |
| Min. Pupil | 2.0 mm | 2.0 mm | 2.0 mm |
| Corneal Diameter | Yes (exclusive) | No | No |
| Condition | Used | Used | Used |
| Price | $4,950 | $3,080 | $3,100 |
Looking for a brand-new autorefractor keratometer? Consider the Hans Heiss HRK-9900 ($5,670) or the Tomey RC-5000 ($4,180) for a touchscreen alternative.
Questions about the Topcon KR-8900 autorefractor keratometer? Contact us for availability and shipping details.
