Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thickness Mapping of Eleven Retinal Layers in Normal Eyes Using Spectral
  Domain Optical Coherence Tomography   Purpose. This study was conducted to determine the thickness map of eleven
retinal layers in normal subjects by spectral domain optical coherence
tomography (SD-OCT) and evaluate their association with sex and age. Methods.
Mean regional retinal thickness of 11 retinal layers were obtained by automatic
three-dimensional diffusion-map-based method in 112 normal eyes of 76 Iranian
subjects. Results. The thickness map of central foveal area in layer 1, 3, and
4 displayed the minimum thickness (P<0.005 for all). Maximum thickness was
observed in nasal to the fovea of layer 1 (P<0.001) and in a circular pattern
in the parafoveal retinal area of layers 2, 3 and 4 and in central foveal area
of layer 6 (P<0.001). Temporal and inferior quadrants of the total retinal
thickness and most of other quadrants of layer 1 were significantly greater in
the men than in the women. Surrounding eight sectors of total retinal thickness
and a limited number of sectors in layer 1 and 4 significantly correlated with
age. Conclusion. SD-OCT demonstrated the three-dimensional thickness
distribution of retinal layers in normal eyes. Thickness of layers varied with
sex and age and in different sectors. These variables should be considered
while evaluating macular thickness.

31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
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The categories of this paper are: solv-int