Novel hyperparallel optical coherence tomography for angle closure assessment: comparison with swept-source OCT and...

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Angle closure glaucoma is a significant cause of vision loss.
• Accurate assessment of the anterior chamber angle is crucial for diagnosis and management.
• Existing imaging technologies have limitations in reproducibility and visualization.

Purpose of the Study:

• To evaluate the reproducibility and agreement of angle closure assessment using a novel hyperparallel optical coherence tomography (HP-OCT) system.
• To compare HP-OCT findings with those from swept-source OCT (SS-OCT) and gonioscopy.

Main Methods:

• A cross-sectional study involving phakic subjects over 40 years old.
• Same-day evaluations using HP-OCT, SS-OCT, and gonioscopy.
• Analysis of intra- and inter-device agreement for angle closure detection (primary outcome) and trabecular meshwork (TM) visibility (secondary outcome).

Main Results:

• HP-OCT showed excellent reproducibility for angle closure assessment (AC1: 0.95 temporal, 1.00 nasal).
• Very good agreement was found between HP-OCT and SS-OCT (AC1: 0.88 temporal, 0.81 nasal).
• Good agreement was observed between HP-OCT and gonioscopy (AC1: 0.71 temporal, 0.78 nasal).
• Trabecular meshwork was identifiable in 64.4% of HP-OCT images, but not in SS-OCT images.

Conclusions:

• HP-OCT is a reliable tool for angle closure assessment with excellent reproducibility.
• HP-OCT demonstrates good agreement with established methods like SS-OCT and gonioscopy.
• HP-OCT's ability to visualize the trabecular meshwork and Schlemm's canal opens new research avenues for glaucoma.