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You are on our international English website. This site features our entire product portfolio worldwide. The products featured may not be available in the US. If you are a citizen from the US, please visit your country website for local information and contacts.

You are on our international English website. This site features our entire product portfolio worldwide. The products featured may not be available in the US. If you are a citizen from the US, please visit your country website for local information and contacts.
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EISS IOLMaster 700 and IOLMaster 500 ophthalmic biometry devices, shown side by side.
Product Category

ZEISS Optical Biometers

Defining biometry for more than 25 years

More than 25 years ago, ZEISS introduced the first optical biometer and revolutionized IOL power calculations. Since then IOLMaster® biometers from ZEISS have become the most commonly used biometers in the ophthalmic world with more than 150 million IOL power calculations to date.

Explore our optical biometers
ZEISS Optical Biometers
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Optical biometers from ZEISS for all your needs

Front view of the ZEISS IOLMaster 700 ophthalmic biometry device.

ZEISS IOLMaster 700

ZEISS IOLMaster 700 brings together the key measurements, advanced formulas, workflow integration and planning confidence you need to start every case on solid ground. Build the right foundation for your cataract workflow, so every scan, every calculation and every planning step moves you forward with greater confidence.

ZEISS IOLMaster 700
Side view of the ZEISS IOLMaster 500 ophthalmic biometry device with touchscreen display.

ZEISS IOLMaster 500

The continually refined gold standard in optical biometry is designed for cataract surgeons looking for a fast, reliable and easy-to-use optical biometer with a great price-to-value ratio.

ZEISS IOLMaster 500

Defining biometry

… did you know?
  • 1 million

    labor hours has the ZEISS development team spent on the IOLMaster over the past 25 years.

  • up to 99%

    is the cataract penetration rate of the latest optical biometer the ZEISS IOLMaster 700.

    Optical biometry explained

  • >150 million

    IOL power calculations have been performed using a ZEISS IOLMaster.

    Read more about IOL calculation formulas

Comparison of ZEISS optical biometers

ZEISS IOLMaster 700
ZEISS IOLMaster 500
Technological basis

Swept Source OCT, image-based B-scan biometry
Partial coherence interferometry (PCI), A-scan biometry
IOL calculation formulas

Barrett Suite: Barrett Universal II & Barrett Universal II TK1, Barrett toric & Barrett toric TK1, Barrett True K & Barrett True K with TK1; Haigis Suite (includes Haigis, Haigis-L, Haigis-T); Hoffer® Q, Holladay 1 and 2, SRK®/T, Barrett True K toric & Barrett True-K toric with TK, Kane and Kane toric

Haigis, Haigis-L, Hoffer® Q, Holladay 1 and 2, SRK® II, SRK® / T
Ease of use
Traffic light indicators, automatic mode, plausibility checks, multi-touch screen
Traffic light indicators, automatic mode, plausibility checks
Cataract penetration rate

up to 99%³
> 93%³
Measurement speed for two eyes

< 45 sec4
< 60 sec⁴
Keratometric measurement
Telecentric (3 zones), anterior & posterior (Total Keratometry)
Telecentric, anterior
Fixation Check
✓
-
Patented Cornea-to-Retina Scan
✓
-
Lens thickness
✓
-

Central Topography

✓

-
  • 1

    optional; Barrett TK formulas require Barrett Suite
  • 2

    optional
  • 3

    R. Varsits, N. Hirnschall, B. Doeller, O. Findl; Increasing the number of successful axial eye length measurements using swept-source optical coherence tomography technology compared to conventional optical biometry; presented at ESCSR 2016.
  • 4

    Depending on experience of operator and eye conditions.