Normal macular structure measured with optical coherence tomography across ethnicity

Area of Science:

• Ophthalmology
• Retinal imaging
• Human anatomy

Background:

• Ethnicity influences retinal pathology prevalence.
• Optical coherence tomography (OCT) enables quantitative macular structure analysis.
• Spectral domain OCT (SD-OCT) provides high-resolution imaging.

Purpose of the Study:

• Investigate macular layer morphology in healthy individuals across ethnicities.
• Compare Asian (Indian subcontinent) and Caucasian macular structure using SD-OCT.
• Identify ethnic variations in retinal layer thickness.

Main Methods:

• 133 healthy volunteers (67 Asian, 66 Caucasian) underwent SD-OCT examination.
• Retinal and nerve fiber layer thickness were measured semi-automatically.
• Macular tomograms were analyzed to quantify retinal layer measurements.

Main Results:

• Significant differences in macular structure were observed between Asian and Caucasian participants.
• Caucasians exhibited thicker inner segment, outer segment, and outer nuclear layers.
• Asians demonstrated a thicker retinal pigment epithelial layer in the temporal region.

Conclusions:

• Ethnic differences in macular morphology are significant.
• Consider ethnic variations for diagnostic control values.
• Findings can inform future research on macular pathology risk and prognosis.