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  2. Choroid - Wikipedia

    en.wikipedia.org/wiki/Choroid

    The choroid, also known as the choroidea or choroid coat, is a part of the uvea, the vascular layer of the eye. It contains connective tissues , and lies between the retina and the sclera . The human choroid is thickest at the far extreme rear of the eye (at 0.2 mm), while in the outlying areas it narrows to 0.1 mm. [ 1 ] The choroid provides ...

  3. Retina - Wikipedia

    en.wikipedia.org/wiki/Retina

    The choroid supplies about 75% of these nutrients to the retina and the retinal vasculature only 25%. [ 5 ] When light strikes 11-cis-retinal (in the disks in the rods and cones), 11-cis-retinal changes to all-trans-retinal which then triggers changes in the opsins.

  4. Uvea - Wikipedia

    en.wikipedia.org/wiki/Uvea

    The uvea (/ ˈ j uː v i ə /; [1] derived from Latin: uva meaning "grape"), also called the uveal layer, uveal coat, uveal tract, vascular tunic or vascular layer, is the pigmented middle layer of the three concentric layers that make up an eye, precisely between the inner retina and the outer fibrous layer composed of the sclera and cornea.

  5. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    The innermost is the retina, which gets its oxygenation from the blood vessels of the choroid (posteriorly) as well as the retinal vessels (anteriorly). The spaces of the eye are filled with the aqueous humour anteriorly, between the cornea and lens, and the vitreous body , a jelly-like substance, behind the lens, filling the entire posterior ...

  6. Chorioretinitis - Wikipedia

    en.wikipedia.org/wiki/Chorioretinitis

    Chorioretinitis is an inflammation of the choroid (thin pigmented vascular coat of the eye) and retina of the eye. It is a form of posterior uveitis. Inflammation of these layers can lead to vision-threatening complications. If only the choroid is inflamed, not the retina, the condition is termed choroiditis. [1]

  7. Posterior segment of eyeball - Wikipedia

    en.wikipedia.org/wiki/Posterior_segment_of_eyeball

    The posterior segment or posterior cavity [1] is the back two-thirds of the eye that includes the anterior hyaloid membrane and all of the optical structures behind it: the vitreous humor, retina, choroid, and optic nerve. [2]

  8. Retinal pigment epithelium - Wikipedia

    en.wikipedia.org/wiki/Retinal_pigment_epithelium

    The pigmented layer of retina or retinal pigment epithelium (RPE) is the pigmented cell layer just outside the neurosensory retina that nourishes retinal visual cells, and is firmly attached to the underlying choroid and overlying retinal visual cells. [1] [2]

  9. Pachychoroid disorders of the macula - Wikipedia

    en.wikipedia.org/wiki/Pachychoroid_disorders_of...

    Pachychoroid disorders of the macula represent a group of diseases affecting the central part of the retina of the eye, the macula. Due to thickening and congestion of the highly vascularized layer underneath the macula, the choroid, damage to the retinal pigment epithelium and the retinal photoreceptor cells ensues. This leads to impaired vision.