Ocular Biometry and Refractive Prediction in Short Eyes: A Comparison of Two Swept-Source Optical Coherence...

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical Devices

Background:

• Accurate ocular biometry is crucial for predicting refractive outcomes after cataract surgery, especially in eyes with short axial length (AL).
• Swept-source optical coherence tomography (SS-OCT) biometers offer advanced capabilities for measuring ocular parameters.

Purpose of the Study:

• To compare the performance of two SS-OCT biometers, IOLMaster® 700 and ARGOS®, in measuring ocular biometry.
• To evaluate and compare the accuracy of postoperative refractive error prediction between these two devices in eyes with short AL (≤ 22 mm).

Main Methods:

• A comparative study involving 48 eyes from 29 patients with short AL.
• Measurements of axial length (AL), anterior chamber depth (ACD), keratometry (K), and lens thickness (LT) were obtained using both IOLMaster® 700 and ARGOS® prior to cataract surgery.
• Intraclass correlation coefficients (ICCs) were calculated to assess agreement, and prediction errors were analyzed.

Main Results:

• Both devices demonstrated high agreement in ocular biometry measurements (ICCs > 0.95).
• Significant differences were found in AL and ACD measurements, with shorter values recorded by the IOLMaster® 700 (p < 0.001).
• No significant difference in mean absolute prediction errors was observed (p = 0.423), though IOLMaster® 700 showed a slightly lower mean prediction error (+0.12 D vs. +0.20 D, p = 0.006).

Conclusions:

• IOLMaster® 700 and ARGOS® exhibit good agreement in ocular biometry for short eyes, but significant differences in AL and ACD measurements exist.
• Both SS-OCT biometers are effective and comparable in predicting postoperative refractive errors, with high percentages of eyes within ±0.50 D and ±1.00 D of the target refraction.