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H. Tanabe, Y. Ito, H. Terasaki; Choroid is Thinner in Inferior Region of Optic Discs of Normal Eyes. Invest. Ophthalmol. Vis. Sci. 2010;51(13):344.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the thickness of the choroid across the posterior pole of clinic-based normal eyes.
Twenty-eight normal eyes of 15 men and 13 women with a mean age of 54.1 ± 20.0 years were studied. The macula and retina around the optic disc were scanned with a spectral-domain optical coherence tomographic (SD-OCT) instrument. The retinal mapping program with the enhanced depth imaging (EDI) technique was used, and the border of the choroid was drawn manually in each OCT image. A choroidal thickness map was constructed by the built-in program, and the choroidal thickness in the different sectors of the ETDRS grid was measured by the built-in program. The choroidal thicknesses in the superior, inferior, nasal, temporal and central sectors of the inner and outer rings were compared in the macular and optic disc regions.
The choroid inferior to the optic disc was significantly thinner than that in the other sectors of the outer ring in all eyes (P <0.001). The mean choroidal thickness at the nasal sector of the macular region was significantly thinner than other regions in both the inner and outer rings of the ETDRS grid (outer ring: P <0.001, inner ring: P <0.05).
The significant differences in the thicknesses of the choroid in the different sectors of normal eyes must be considered when the choroid of eyes with different types of retinal and choroidal diseases is studied.
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