Predictability of Biometry in Patients Undergoing Cataract Surgery

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Surgical Technology

Background:

• Accurate biometry is crucial for predictable refractive outcomes in cataract surgery.
• The Aladdin and IOLMaster are widely used devices for obtaining ocular measurements.
• Comparing their performance is essential for clinical decision-making.

Purpose of the Study:

• To compare axial length (AL), anterior chamber depth (ACD), and keratometry (K) measurements between the Aladdin and IOLMaster biometry devices.
• To evaluate and compare the refractive predictability of both devices in cataract surgery patients.

Main Methods:

• A retrospective observational study analyzed data from 127 eyes undergoing cataract surgery.
• Axial length, anterior chamber depth, and keratometry measurements were obtained using both Aladdin and IOLMaster devices.
• Postoperative refractive prediction errors were compared between the two devices.

Main Results:

• Excellent correlation was observed for axial length (r = 0.9997) and keratometry (r = 0.9912) between Aladdin and IOLMaster.
• Mean axial length and anterior chamber depth measurements showed no significant differences (p = 0.792 and p = 0.873, respectively).
• While initial mean absolute error in refractive prediction differed (p = 0.001), it became non-significant after adjusting for keratometry variations (p = 0.601).

Conclusions:

• Aladdin and IOLMaster demonstrate strong agreement in axial length, keratometry, and anterior chamber depth measurements.
• The refractive predictability of both biometry devices is comparable after accounting for minor keratometry differences.
• These findings support the interchangeable use of both devices in routine cataract surgery planning.