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

Optical biometers from ZEISS for all your needs

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.

ZEISS IOLMaster 700

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	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	✓	-

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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.