Did the OCT Show Progression Since the Last Visit?

Area of Science:

• Ophthalmology
• Medical Imaging
• Glaucoma Research

Background:

• Glaucoma management relies on accurate progression identification.
• Guided Progression Analysis (GPA) is a key tool, initially for visual fields and now extended to optical coherence tomography (OCT) metrics like retinal nerve fiber layer (RNFL) and ganglion cell+inner plexiform layer thickness.
• Current OCT GPA requires multiple tests (3-4) and may not address immediate clinical questions about progression since the last visit.

Purpose of the Study:

• To address the challenge of timely glaucoma progression detection between patient visits.
• To propose an alternative method for identifying glaucoma progression using OCT data.
• To enhance clinical decision-making regarding suspected glaucoma progression.

Main Methods:

• Evaluating RNFL and ganglion cell+inner plexiform layer probability maps from OCT.
• Analyzing circumpapillary OCT B-scan images.
• Topographically comparing changes in OCT maps and images with visual field changes.

Main Results:

• Standard summary statistics for RNFL thickness have limited sensitivity and specificity due to errors.
• Direct evaluation of OCT probability maps and B-scan images offers a more detailed assessment.
• Topographical comparison of OCT and visual field data aids in identifying progression.

Conclusions:

• Relying solely on OCT GPA or summary statistics may be insufficient for detecting progression between visits.
• Directly evaluating OCT probability maps and B-scan images is recommended.
• Integrating topographical comparisons of OCT and visual field changes improves the accuracy of glaucoma progression assessment.