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Warren Hill, M.D.
IOLMaster Main
Page - IOL Master
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The Zeiss
IOL Master was
approved by the United States Food and Drug Administration in March of 2000.
A non-contact optical device that measures the distance from the corneal vertex
to the retinal pigment epithelium by partial coherence interferometry, the IOL
Master is consistently accurate to within ±0.02 mm or better.
The IOL Master is the first such
device to be widely used in clinical ophthalmology. Calibrated against the ultra-high
resolution 40-MHz Grieshaber Biometric System, an internal algorithm approximates
the distance to the vitreoretinal interface, for the equivalent of an immersion
A-scan ultrasonic axial length.
Considering the fact that axial length measurements by A-scan
ultrasonography (using a standard 10-MHz transducer) have a typical
resolution of 0.10 mm to 0.12 mm, axial length measurements by the IOL Master represent a fivefold increase in accuracy.
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Zeiss IOL Master
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