Anterior segment parameters measured with 2 optical devices compared to ultrasonic data

Area of Science:

• Ophthalmology
• Biomedical Optics
• Medical Imaging

Background:

• Accurate measurement of anterior segment parameters is crucial for ophthalmic diagnoses and surgical planning.
• Various optical and ultrasonic devices are available for these measurements, each with potential variations in accuracy and reliability.

Purpose of the Study:

• To compare anterior segment measurements obtained from two optical devices against an ultrasonic technique.
• To evaluate the consistency and correlation between different measurement modalities for axial length, anterior chamber depth, and central corneal thickness.

Main Methods:

• Axial length (AL) was measured using IOLMaster.
• Anterior chamber depth (ACD) was determined with IOLMaster, Visante optical coherence tomography (OCT), and Pentacam HR.
• Central corneal thickness (CCT) was measured using Pentacam HR and ultrasound.

Main Results:

• Strong correlations were found between Pentacam HR and ultrasonic measurements for CCT (r=0.89) and between Pentacam HR and Visante OCT for CCT (r=0.88).
• A significant correlation was observed between Pentacam HR and IOLMaster for ACD (r=0.95).
• Significant correlation was also found between AL and ACD measured with IOLMaster (r=0.67).

Conclusions:

• Optical devices and ultrasound demonstrate a strong correlation in measuring central corneal thickness.
• The anterior chamber depth measurements show significant correlation between Pentacam HR and IOLMaster, indicating potential interchangeability.