The Zeiss IOL (Intra Ocular Lens) Master allows fast, accurate measurements of eye length and surface curvature, necessary for the determination of the IOL power used during cataract and lens implantation surgery. The Zeiss IOL (Intra Ocular Lens) 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.
Clinical studies have verified that the IOLMaster enables user-independent measuring results. These studies have also shown that considerably higher reproducibility is obtained than with ultrasound biometry.
The IOL Master allows fast, accurate measurements of eye length and surface curvature, necessary for cataract surgery. The IOL Master is more efficient because it allows measurements to be taken with complete confidence in the accuracy of the results. Also, because the IOL Master is non-contact (nothing touches the eye itself), there is no need for anesthesia and there is no potential for spread of contamination. Dr. Fite will use the measurements taken by the IOL Master to determine the exact prescription of the IOL needed for your surgery.