Distributed scanning volumetric SDOCT for motion corrected corneal biometry.

Area of Science:

• Ophthalmology
• Biomedical Optics
• Medical Imaging

Background:

• Patient motion significantly impacts the accuracy of corneal biometry.
• Current spectral domain optical coherence tomography (SDOCT) systems are susceptible to motion-induced artifacts.

Purpose of the Study:

• To introduce and evaluate a novel method, distributed scanning OCT (DSOCT), for reducing motion artifacts in corneal biometry.
• To assess the repeatability and accuracy of DSOCT compared to established methods.

Main Methods:

• A pilot study analyzed the power spectrum of axial eye motion using M-mode SDOCT.
• DSOCT was employed in a preliminary patient study to measure anterior and posterior corneal curvatures and corneal power.
• Measurements were compared against corneal topography and Scheimpflug photography.

Main Results:

• DSOCT effectively reduces the impact of patient motion on corneal biometry.
• Repeatability of anterior and posterior corneal curvature measurements using DSOCT was comparable to existing methods.
• Calculated corneal refractive power using DSOCT demonstrated similar repeatability to topography and Scheimpflug photography.

Conclusions:

• DSOCT is a promising technique for accurate corneal biometry, even in the presence of patient motion.
• The method offers comparable precision to current clinical standards, enhancing diagnostic reliability.
• DSOCT utilizes readily available SDOCT technology, facilitating clinical adoption.