The Evaluation of the Relation Between Iris and Choroidal Thickness

Area of Science:

• Ophthalmology
• Anatomy
• Biomedical Optics

Background:

• The relationship between anterior and posterior ocular segment dimensions is not fully understood.
• Iris thickness (IT) and choroidal thickness (CT) are key anatomical parameters influencing ocular health.
• Investigating correlations between these structures may provide insights into ocular development and disease.

Purpose of the Study:

• To investigate the correlation between iris thickness (IT) and choroidal thickness (CT) in a cohort of healthy subjects.
• To determine if specific measurements of IT correlate with specific measurements of CT.
• To explore potential anatomical links between the iris and choroid.

Main Methods:

• Forty-five healthy participants (24 women, 21 men; age 18-62 years) were enrolled.
• Iris thickness was measured using anterior segment optical coherence tomography (AS-OCT) at 750 μm and 2000 μm from the temporal and nasal scleral spurs.
• Choroidal thickness was measured using optical coherence tomography at 750 μm and 2000 μm from the center of the fovea on both nasal and temporal sides.

Main Results:

• Significant positive correlations were observed between temporal choroidal thickness (CT750T) and multiple iris thickness measurements (IT750T, IT750N, IT2000N).
• Significant positive correlations were also found between temporal choroidal thickness at 2000 μm (CT2000T) and iris thickness measurements (IT750T, IT750N, IT2000N).
• Statistical analysis revealed significant p-values for all reported correlations, indicating their reliability.

Conclusions:

• A significant correlation exists between choroidal thickness and iris thickness at various measurement points in healthy individuals.
• These findings suggest an anatomical interdependence between the iris and choroid.
• Further research may elucidate the clinical implications of this correlation in ocular health and disease.