page_title: Retina
section_title: Layers imagable with optical coherence tomography
hierarchical_section_title: Retina / Structure / Retinal layers / Layers imagable with optical coherence tomography
caption_attribution_description: English: The healthy macula of a 24 year old male (cross-section view). This image is released to Wikimedia with patient consent. Imaged in-vivo with an Optovue iVue Spectral Domain Optical Coherence Tomographer (SD-OCT) at the office of Drs. Harry Wiessner, Steven Davis, Daniel Wiessner, and Eric Wiessner in Walla Walla, WA, USA.
context_page_description: The retina is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which translates that image into electrical neural impulses to the brain to create visual perception. The retina serves a function analogous to that of the film or image sensor in a camera.
  The neural retina consists of several layers of neurons interconnected by synapses and is supported by an outer layer of pigmented epithelial cells. The primary light-sensing cells in the retina are the photoreceptor cells, which are of two types: rods and cones. Rods function mainly in dim light and provide black-and-white vision. Cones function in well-lit conditions and are responsible for the perception of colour, as well as high-acuity vision used for tasks such as reading. A third type of light-sensing cell, the photosensitive ganglion cell, is important for entrainment of circadian rhythms and reflexive responses such as the pupillary light reflex.
context_section_description: Using optical coherence tomography (OCT) there are 18 layers that can be identified in the retina. The layers and anatomical correlation are as follows:
  From innermost to outermost, the layers identifiable by OCT are as follows:
caption: Spectral-Domain OCT macula cross-section scan.
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