choroid
Retina's blood supply
The choroid is the vascular layer of the eye between the retina and the sclera, rich in blood vessels that nourish the outer layers of the retina.
It appears as a dark membrane due to pigment that absorbs excess light, preventing internal reflections.
Also called the choroid coat.
As an adjective, choroid describes membrane-like structures resembling this layer.
Eye's middle coat
- ciliaryOf eyelash structures
- scleraEyeball's outer membrane
- retinaLight-sensing tissue layer
- irisEye's pigmented disc
eyeball · optic · lens · vitreous · macula · fovea · fundus · aqueous
Fluid delivery to tissue
- blood supplyCirculatory delivery to tissues
- capillariesTiniest blood vessels
- arteriesTubes carrying oxygenated blood
- veinsBlood-return tubes
circulation · angiogenesis · hemorrhage · ischemia · oxygenation · vasculature · fenestrated · anastomosis
Natural coloring compound
- melanocytesPigment-producing skin cells
- pigmentationNatural tissue coloring
- eumelaninBrown-black biological pigment
- nevusPigmented dermal lesion
albinism · light absorption · hyperpigmentation · depigmentation
Unrestrained emotional discharge
- ruptureViolent tearing apart
- hemangiomaBenign tumor of vessels
- metastasisCancer spreading beyond origin
- atrophyWasting from disuse
Interior eye examination procedure
- angiographyImaging of blood vessels
- ultrasoundInaudible high-frequency waves
- imagingProducing visual representations
- examinationMethodical assessment or review
uvea
Eye's middle coat
iris · eyeball · optic · lens · vitreous · macula · fovea · fundus · aqueous · lamina
perfusion
Fluid delivery to tissue
- blood supplyCirculatory delivery to tissues
- capillariesTiniest blood vessels
- arteriesTubes carrying oxygenated blood
veins · circulation · angiogenesis · hemorrhage · ischemia · oxygenation · vasculature · fenestrated · anastomosis · hypoxia
melanin
Natural coloring compound
- melanocytesPigment-producing skin cells
- pigmentationNatural tissue coloring
- eumelaninBrown-black biological pigment
nevus · albinism · light absorption · hyperpigmentation · depigmentation
effusion
Unrestrained emotional discharge
- ruptureViolent tearing apart
- hemangiomaBenign tumor of vessels
- metastasisCancer spreading beyond origin
atrophy · sclerosis · hemorrhage · inflammation · uveitis
ophthalmoscopy
Interior eye examination procedure
- angiographyImaging of blood vessels
- ultrasoundInaudible high-frequency waves
- imagingProducing visual representations
choroidretina
Light-sensing tissue layer
cornea · sclera · lens · vitreous humor · optic nerve
- choroid plexusCSF-secreting brain structure