Description
Zeiss IOLMaster 500 — Refurbished Optical Biometer for IOL Power Calculation
The Zeiss IOLMaster 500 established the clinical standard for non-contact optical biometry and remains the most widely validated biometer in cataract surgery practice worldwide. This refurbished Zeiss IOLMaster 500 uses partial coherence interferometry (PCI) to deliver highly reproducible axial length measurements, six-point keratometry, and anterior chamber depth — all without patient contact — for accurate IOL power calculation in standard and complex cataract cases.
Clinical evidence published in the National Library of Medicine established that partial coherence interferometry provides significantly more precise axial length measurements than conventional contact applanation ultrasound biometry — with accuracy that set the benchmark for modern optical biometry and contributed to the widespread adoption of non-contact measurement in cataract surgery planning.
What’s Included
- Zeiss IOLMaster 500 main unit
- Patient chin and forehead rest assembly
- Integrated IOL formula software
- Monitor, keyboard, and accessories
- Power and data cables
- 6-month Digital Eye Center warranty
Why Practices Choose the Zeiss IOLMaster 500
- Partial coherence interferometry (PCI) — non-contact axial length measurement with 0.01 mm precision; the most validated biometry technology in cataract surgery, backed by hundreds of peer-reviewed publications
- Six-point keratometry — measures corneal curvature at six points for accurate K-reading in both regular and mildly irregular corneas; more robust than two-point contact keratometry
- Anterior chamber depth measurement — ACD measurement for Haigis formula and anterior chamber IOL planning
- White-to-white and pupil diameter — additional measurements for sulcus and phakic IOL sizing
- Full formula library — SRK/T, Holladay 1, Hoffer Q, Haigis, and additional formulas pre-loaded; Barrett Universal II available via software update on supported versions
- Fast patient workflow — typical complete biometry measurement in under 60 seconds; efficient throughput for high-volume cataract lanes
- Refurbished value — the most trusted optical biometer in cataract practice at a fraction of new IOLMaster 700 cost; ideal for standard monofocal and toric cataract cases
Clinical Applications
- Standard cataract IOL power calculation — PCI axial length combined with six-point keratometry provides the measurement foundation for accurate monofocal IOL selection across all major formula platforms
- Toric IOL planning — keratometric astigmatism measurement guides toric IOL power and axis selection for practices offering refractive cataract surgery
- Post-refractive cataract cases — LASIK, PRK, and RK history adjustments using Haigis-L and other post-refractive formulas supported within the IOLMaster 500 platform
- Phakic IOL sizing — WTW and ACD measurements support sizing for ICL and other phakic implants
- Pre-surgical documentation — complete biometry printout provides the measurement record required for cataract surgery scheduling and surgical consent documentation
Who This Is For
- Cataract surgeons performing standard and toric IOL cases — the IOLMaster 500 delivers the measurement accuracy needed for monofocal and toric implantation; practices not yet offering multifocal EDOF lenses (which benefit from IOLMaster 700 TK measurement) achieve excellent outcomes with the 500
- Practices replacing A-scan contact biometers — the IOLMaster 500 eliminates corneal compression artifact and patient contact; a direct upgrade from any ultrasound-based biometry system
- High-volume ASCs and surgical centers — reliable, fast throughput in a compact footprint; low maintenance for high-volume pre-op lanes
- Second-unit pre-op lanes — identical workflow to the IOLMaster 700; staff can rotate between instruments with no learning curve
- Budget-focused practices — the IOLMaster 500 remains clinically appropriate for the majority of cataract cases at roughly one-third the cost of a new IOLMaster 700
Technical Specifications
| Spec | Detail |
| Manufacturer | Carl Zeiss Meditec |
| Model | IOLMaster 500 |
| Technology | Partial coherence interferometry (PCI) |
| Axial Length Precision | 0.01 mm |
| Keratometry | Six-point measurement |
| Measurements | AL, K (flat/steep), ACD, WTW, pupil diameter |
| IOL Formulas | SRK/T, Holladay 1, Hoffer Q, Haigis, Haigis-L, and more |
| Contact Required | No (non-contact) |
| Dense Cataract Performance | Limited in dense nuclear sclerosis (see IOLMaster 700) |
| Condition | Refurbished |
| Warranty | 6 months |
Condition & Warranty
Refurbished. This Zeiss IOLMaster 500 has been fully inspected, calibrated, and verified to factory specifications by a certified ophthalmic equipment technician. Covered by a 6-month warranty on parts and workmanship.
Compare Zeiss IOLMaster Options
| Model | Technology | Dense Cataract | Condition | Price |
| IOLMaster 700 | SS-OCT + TK | Yes | Refurbished | $37,500 |
| Topcon Aladdin-M | PCI + Topography | No | Brand new | $16,500 |
| IOLMaster 500 (this unit) | PCI | Limited | Refurbished | $12,825 |
| IOLMaster 5.4 | PCI | No | Refurbished | $7,125 |
Questions about the Zeiss IOLMaster 500? Contact us — we’ll confirm the software version and advise on whether the 500 or 700 better suits your surgical case mix.
