Correlation of Choroidal Thickness With Outer and Inner Retinal Layers

BACKGROUND AND OBJECTIVE: To investigate the correlation of choroidal thickness with the outer and inner retinal layers. PATIENTS AND METHODS: A retrospective OCT scan review was conducted for healthy patients. Choroidal, outer retinal layer, and inner retinal layer thicknesses were measured at the fovea and 500 mu m, 1,000 mu m, and 1,500 mu m temporal and nasal to the fovea. Retinal thickness was also measured at the foveal center. Choroidal thickness (CT) was compared at different locations, and correlation of CT with the outer and inner retinal layers was examined. RESULTS: Mean CT was thinnest nasally, thicker in the subfoveal region, and then thinner again temporally. Correlations found between CT and outer retinal layer thicknesses at temporal points to the fovea were slightly higher than correlations between CT and inner layer thicknesses. CONCLUSION: The correlation between choroidal thickness and the outer retinal layer was very weak. Similar prospective trials are needed to assess the correlation of CT with retinal layers.