Modified intraocular lens power selection method according to biometric subgroups Eom IOL power calculator

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical device development

Background:

• Accurate intraocular lens (IOL) power calculation is crucial for achieving desired refractive outcomes after cataract surgery.
• Existing IOL power calculation formulas may have varying accuracy across diverse patient biometric subgroups.

Purpose of the Study:

• To evaluate the accuracy of a novel Eom intraocular lens (IOL) power calculation method.
• To compare the performance of the Eom formula against established formulas (Barrett Universal II, Haigis, Hoffer Q, Holladay 1, Ladas Super, SRK/T) in a large patient cohort.

Main Methods:

• Retrospective cross-sectional study involving 1600 eyes.
• Development of the Eom IOL power calculator using 768 biometric subgroups.
• Validation using a separate dataset and comparison of Median Absolute Errors (MedAE) and IOL Formula Performance Indexes (FPIs).

Main Results:

• The Eom formula achieved a significantly smaller MedAE (0.22 D) compared to most traditional formulas.
• The Eom formula demonstrated the highest IOL Formula Performance Index (FPI) of 0.553, ranking first among all tested formulas.
• Performance of the Eom formula was comparable or slightly superior to the Barrett Universal II and Ladas Super formulas.

Conclusions:

• The Eom IOL power calculator offers high accuracy for predicting refractive outcomes after cataract surgery.
• The Eom formula provides a valuable alternative, showing superior or comparable performance to existing methods across various biometric profiles.