ZEISS IOLMaster 700: SW 1.80 & Total Keratometry Overview

Introduction to Total Keratometry (TK)

The ZEISS IOLMaster 700 introduces Total Keratometry (TK), a new measurement combining telecentric keratometry and SWEPT Source OCT technology. TK assesses both anterior and posterior corneal curvature, aiming to replace standard keratometry, reduce outliers, and improve refractive outcomes in IOL calculations.

Key Features and Benefits

• Comprehensive Corneal Measurement: Measures anterior and posterior corneal surfaces for more accurate total corneal power assessment.
• Improved IOL Calculation: Enhances toric IOL power calculations, with studies showing up to 14% more patients within +/- 0.5D cylinder.
• Telecentric Keratometry: Utilizes a unique optical system for distance-independent, robust, precise, and repeatable keratometry.
• Software 1.80 Updates: Includes enhancements in measurement (e.g., Enhanced Fixation/AL Check Scan), analysis (e.g., pupil offset), IOL calculation (e.g., target refraction, LVC status), and print/export options.
• Barrett TK Formulas: Supports new Barrett TK formulas for more accurate IOL power calculations using actual posterior corneal surface values.
• Workflow Efficiency: Streamlines processes with an intuitive GUI, flexible print/export options, and direct integration with systems like CALLISTO eye.

Clinical Impact

By incorporating posterior corneal data, the ZEISS IOLMaster 700 helps minimize refractive surprises, offering improved consistency and better overall outcomes for both toric and non-toric IOL implantation.

Resources

• ZEISS IOLMaster 700 Website
• Total Keratometry Information
• ZEISS Cataract Community
• ULIB (IOL Constants)
• IOLCon (IOL Constants)