Prediction and Estimation of Postoperative Refractive Error in Phacoemulsification: Using Ultrasound A-Scan and Intra...

Area of Science:

• Ophthalmology
• Biomedical Engineering

Background:

• Phacoemulsification requires precise intraocular lens (IOL) power calculation for optimal postoperative refractive outcomes.
• Accurate ocular biometry is crucial for predicting refractive results after cataract surgery.

Purpose of the Study:

• To compare the reliability of IOL Master and A-scan biometry in predicting postoperative refractive error following phacoemulsification.
• To evaluate the predictive accuracy of axial length and keratometry readings for IOL power calculation and refractive outcomes.

Main Methods:

• A cross-sectional study involving 90 participants undergoing phacoemulsification.
• Axial length (AL) and keratometry (K-reading) were measured using IOL Master and A-scan.
• Preoperative measurements were compared, and postoperative refractive error was analyzed using univariate and quadratic regression analyses.

Main Results:

• IOL Master and A-scan showed significant differences in AL and anterior chamber depth (ACD) measurements.
• Both AL and K-reading were strong predictors of IOL power calculation and postoperative refractive error.
• Postoperative refractive error was significantly higher with A-scan measurements compared to IOL Master.

Conclusions:

• IOL Master is a more reliable tool for ocular biometry compared to A-scan.
• Utilizing IOL Master can minimize postoperative refractive errors, enhancing surgical outcomes.