ZEISS IOLMaster optical biometers
Product Category

ZEISS Optical Biometers Defining biometry for 20 years

20 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.

Defining biometry

… did you know?

1 million

labor hours has the ZEISS development team spent on the IOLMaster over the past 20 years.


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

>150 million

IOL power calculations have been performed using a ZEISS IOLMaster.

Optical biometers from ZEISS for all your needs

Optical biometer ZEISS IOLMaster 700

ZEISS IOLMaster 700

Featuring Total Keratometry (TK®), this SWEPT Source OCT optical biometer is made for cataract surgeons implanting toric or multifocal IOLs that require superior measurements.

Optical biometer ZEISS IOLMaster 500

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.

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

Licence Total Keratometry1: Barrett TK Universal II and Barrett TK Toric; Barrett Suite(includes Barrett Toric, Barrett True-K & Barrett Universal II); Haigis Suite (includes Haigis, Haigis-L, Haigis-T); Hoffer® Q, Holladay 1 and 2, SRK®/T

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

> 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


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