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Figure 2 | BMC Ophthalmology

Figure 2

From: The effect of incorrect scanning distance on boundary detection errors and macular thickness measurements by spectral domain optical coherence tomography: a cross sectional study

Figure 2

Fundus and macular OCT images taken with suboptimal and optimal settings with RTVue OCT system. Inner and outer retinal segmentation lines are highlighted with yellow color for better observation. Errors are signed with white arrows. (A) Fundus image taken with suboptimal settings in a healthy subject. Note the concentric narrowing of the fundus image due to the pupillary border decreasing the field of view. (B) Corresponding OCT scan of A) fundus image. (Signal strength index =66.8) Outer retinal misidentification is observable at the peripheral region of the scan. (C) Fundus image taken with optimal settings in the same healthy subject. Note that the fundus image fills the entire image. (D) Corresponding OCT scan of C) fundus image. (Signal strength index =72.4) The scan does not contain any errors.

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BMC Ophthalmology

ISSN: 1471-2415

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