Description
What’s Included
- Used Retinomax K-Plus 3 handheld autorefractor keratometer main unit
- Rechargeable battery pack
- Battery charger and AC power adapter
- Carrying case
- Wrist strap
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. This Retinomax K-Plus 3 has been inspected and tested for accurate autorefraction and keratometry function prior to sale. Covered by a 90-day warranty on parts and workmanship through Digital Eye Center.
Retinomax K-Plus 3 — Used Handheld Autorefractor Keratometer
The Retinomax K-Plus 3 is the gold-standard handheld autorefractor keratometer trusted by pediatric ophthalmologists and optometrists worldwide for rapid, accurate objective refraction in any examination setting. As a fully portable unit weighing under one kilogram — with the center of gravity positioned in the grip — the Retinomax K-Plus 3 can be used with patients in any position: seated, lying, or uncooperative. This makes it uniquely suited to pediatric clinics, operating rooms, and mobile screening programs where tabletop instruments cannot reach.
The Retinomax K-Plus 3 combines autorefraction and keratometry in a single measurement cycle, with each reading completed in just 0.35 seconds — minimising fixation time and reducing measurement error in less cooperative patients. According to the National Library of Medicine, the Retinomax K-Plus 3 demonstrates strong accuracy in measuring refractive error in pediatric populations, supporting its clinical role as a reliable pre-exam and screening tool.
Why Practices Choose the Retinomax K-Plus 3
The Retinomax K-Plus 3 represents the third generation of Righton’s Retinomax platform, bringing a lighter body, improved grip ergonomics, and faster measurement cycles versus earlier models. The Series 3 is over 17% lighter than conventional Retinomax models, and the grip-centered balance makes extended clinic sessions far less fatiguing for technicians and clinicians.
- Fully portable handheld design — Operates in any patient position; no table, slit lamp, or fixed mounting required. Ideal for pediatric, supine, and wheelchair-bound patients.
- 0.35-second measurement — Ultra-fast cycle time reduces patient fixation demands and minimises artifact from eye movement or blink.
- Simultaneous REF + KER — Refraction and keratometry captured in a single measurement pass; no separate keratometry step required.
- 17% lighter than prior Retinomax models — Redesigned body and battery placement reduces clinician fatigue during high-volume screening sessions.
- Grip-centered balance — Weight distribution engineered for one-handed operation, freeing the other hand to manage the patient.
- Auto-print output — Automatic printing of REF and KER data; optional wireless transfer to a Remote Vision unit for EMR integration.
- Rechargeable battery — Cordless operation untethers the clinician from the exam chair for true portability across exam lanes and locations.
Clinical Applications
The Retinomax K-Plus 3 handles the full range of scenarios where a tabletop autorefractor simply cannot be used — and does so with the measurement accuracy that supports clinical decision-making.
- Pediatric vision screening — Rapid objective refraction in young children who cannot cooperate with a standard chin rest; cycloplegic and non-cycloplegic modes supported.
- Pre-exam objective refraction — Baseline refraction before subjective testing in the chair; reduces chair time in both pediatric and adult lanes.
- Intraoperative refraction — Measures refraction in the supine patient during surgery planning or post-operative checks in recovery.
- Contact lens base curve fitting — Keratometry measurements support initial contact lens parameter selection and follow-up assessments.
- Geriatric and mobility-limited patients — Examines patients who cannot transfer to a slit lamp table or standard refraction lane setup.
- Mobile and community screening programs — Portable battery operation enables vision screening in schools, nursing homes, and off-site clinics without fixed equipment.
Who This Is For
The Retinomax K-Plus 3 is the instrument of choice wherever patient access or cooperation challenges make a tabletop refractor impractical.
- Pediatric ophthalmology and optometry practices — The most common setting for the Retinomax; captures objective refraction in infants and toddlers faster and more reliably than most alternatives.
- Hospitals and surgical centers — Intraoperative and recovery-room refraction in supine patients.
- Mobile screening organizations — School vision screenings, community health programs, and rural outreach clinics where portability is essential.
- Geriatric clinics and nursing homes — Patients who cannot transfer to standard exam equipment are reached easily with a handheld instrument.
- Multi-location practices — A single Retinomax can travel between locations and serve as a backup instrument across the entire practice network.
Technical Specifications
The Retinomax K-Plus 3 delivers a full autorefraction and keratometry workup in a package that fits in a coat pocket and operates on a single rechargeable charge through a full clinic day.
| Specification | Detail |
| Model | Retinomax K-Plus 3 |
| Measurement Time | 0.35 seconds per reading |
| Weight | Under 1 kg (17% lighter than prior Retinomax models) |
| Measurement Modes | Autorefraction + keratometry (simultaneous) |
| Operation | Handheld — any patient position |
| Power | Rechargeable battery (cordless) |
| Data Output | Auto-print; optional wireless to Remote Vision unit |
| Condition | Used |
| Warranty | 90 days (Digital Eye Center) |
| Price | $6,900 |
Compare Handheld and Tabletop Autorefractor Options
| Feature | Retinomax K-Plus 3 | Retinomax K-Plus 5 | Nidek ARK-500A | Tomey RC-5000 |
| Form Factor | Handheld | Handheld | Tabletop | Tabletop |
| Condition | Used | Used | Used | Used |
| Warranty | 90 days | 90 days | 90 days | 90 days |
| Price | $6,900 | $8,800 | $4,800 | $4,180 |
Questions about the Retinomax K-Plus 3? Contact us for availability and shipping details.
