A novel analytical method using OCT to describe the corneoscleral junction

Area of Science:

• Ophthalmology and optometry
• Biomedical engineering
• Medical imaging analysis

Background:

• The corneoscleral junction is a critical ocular surface region.
• Quantitative characterization of its angle and topography is lacking.
• Understanding ethnic and quadrant-specific differences is important for ocular health.

Purpose of the Study:

• To develop and validate a novel quantitative method for describing the corneoscleral junction's angle and topography.
• To establish metrics reflecting the junction's geometry using optical coherence tomography (OCT).
• To investigate differences in these metrics across ocular quadrants and ethnic groups.

Main Methods:

• Recruited 48 neophyte subjects (Asian, white, Latino).
• Acquired OCT images of the corneoscleral junction in all quadrants of both eyes.
• Developed custom Matlab software for automated image analysis and metric calculation (SSRo).

Main Results:

• The sum of squared orthogonalized residuals (SSRo) proved to be the most repeatable metric.
• Significantly greater SSRo was observed in the nasal quadrant compared to others (p < 0.001).
• White subjects exhibited significantly higher SSRo than Asian and Latino subjects (p < 0.001).

Conclusions:

• A novel OCT-based metric accurately characterizes corneoscleral junction angle and topography.
• Significant differences exist in corneoscleral junction morphology among quadrants.
• Ethnic variations in corneoscleral junction topography were identified.