Fig. 4.

An illustrative case: images from a normal eye of a 56-year-old man. The refraction in the left eye was + 0.50 diopters. a The color fundus photograph shows a normal fundus appearance. b En face optical coherence tomography image (12 mm × 12 mm) shows vortex veins in the deep layer of the choroid. Superior and inferior vortex veins are symmetrical and there is a horizontal watershed zone (dashed line). c The 12-mm horizontal B-mode OCT image through the fovea shows that the retina and choroid both appear normal. The central choroidal thickness is 194 µm. Reproduced with permission from reference 29