Icho choroid ishavha yakakura yeziso iri pakati pe retina uye sclera. Ichochoroid yakakura kupfuura nechekucheka kweziso pane anenge 0,2 mm uye inopera kusvika ku1 mm mumativi erutivi rweziso. Iine retinal pigmented epithelial cells uye inopa oxygen uye zvokudya kune retina yakabuda. Icho choroid inoumba chikamu chekunze chinosanganisira iris uye ciliary body.
Ichochoroid yakagadzirwa nezvikamu zvina zvakasiyana:
- Hora yeH Haller (ropa guru mudziyo wakatarisa)
- Sattler's layer (midzi midzi midzi yeropa)
- Choriocapillaris (capillaries)
- Bruch's membrane. (membrane mukati memukatikati yechoroid.)
Rima-mavara melanin pigment mujairo inotora chiedza uye zvisingatarisirwi maziso mukati meziso zvinogona kuderedza maonero. Iyo melanin inofungidzirwawo kuti inodzivirira mishonga yeropai yakasvibiswa pamusoro pekuisa chepfu. Choroidal pigment ndiyo inokonzera "maziso matsvuku" apo mifananidzo inopenya inotorwa.
Uyewo Anozivikanwa Se: choroidea; choroid coat
Kunze kwokupa huwandu hwemhepo yakakosha uye neropa kune retina, chirwere chechiroidal runogona kupisa uye kunopisa retina. Ichochoroid inewo masero ayo secrete zvinhu zvinofungidzirwa kuti zvinosanganiswa mukukura kwechiganda. Ichochoroid inogonawo kuchinja ukuru uye izvi zvinogona kuchinja retina mberi uye kumashure, zvichiunza ma photoreceptors mu ndege yekutarisa.
Izvi hazvirevi zvakawanda zvekutarisa asi zvinokosha zvikuru mukukura kweziso kana mwana.
Maziso ako nemaonero akanaka anovimba neropa rakakwana rekushanda. Nokudaro, choroid inofanira kuramba iine utano sezvinobvira panguva dzose. Apo nharaunda yeziso inosanganisira choroid inotapukirwa nenzira ipi zvayo, macula uye magetsi emagetsi angatambura.
Apo macula nemagetsi e-optic zvinokanganisa kana zvisina kunaka zvakagadziriswa, mugumisiro unowanzowedzera kuoma mukuratidzwa uye dzimwe nguva kunyange kupofu zvachose. Mukuwedzera, dzimwe dzakawanda zvirwere zvakakomba zvinogona kuitika semugumisiro wehutachiona.
Zvirwere uye Matambudziko eCroroid
- Hemorrhagic choroidal detachment inokonzera kupisa mumuhara panzvimbo yepamusoro pemakrishoni kana mumasikirini anokonzerwa nekuparara kwemidziyo ye-choroidal. Kunyangwe zvinogona kuitika zvisingatauriki, hazvisi nyore chaizvo. Inowanzoitika semugumisiro wekutambudzika kweziso panguva yekuvhiyiwa kweziso. Hemorrhagic choroidal detachment inogona kuita zviratidzo zvakakura. Kurapa kunosanganisira topical steroid meso madonhwe, cycloplegic madonhwe eziso, uye kuvhara kweziso kuvhara madonhwe eziso.
- Choroidal rupture ndeye kupera kwakakwana muchoroid, Bruch's membrane uye retinal pigment epithelium inowanzoitika nekuda kwekushungurudzika kwemaziso zvakadai sekurohwa nesha . Zvinosuruvarisa kuti, mapuropa akawanda e-choroidal anosanganisira pakati petina, inonzi macula. Iyo macula inotibvumira kuti tive nehupamhi hwepamusoro, pakati pekuona. Kukuvara kunounza kurasikirwa kwemafotoreceptors mu macula uye kurasikirwa kwepakati pekuona. Kana kukanganisa kusati kuri mu macula, chiratidzo chekati chinowanikwa.
- Choroidal nevi ichitsuwa chemasero akavezwa kana kuti asina-pigmented mu choroid, mutsara wevascular under the retina. Zvose zvinokonzera choroidal nevi zvinongoda kuongororwa. Dhigirii weziso rako achaona nzvimbo yekunetseka uye uone kazhinji. Vakawanda havadi chero kurapwa. Kana iyo choroidal nevus ine mavara machena, inooneka yakakwirira, kana kuti ine chimiro chisingawanzoiti, zvinogona kuitika kuti inogona kuva yakaipa yekodoma melanoma. Muchiitiko ichi, kushungurudzwa kune utsinye kunodiwa.
Choroidal dystrophies iboka rezvirwere zvakagara nhaka zvinosvibisa chiroyi . Choroideremia, Gyrate atrophy, Central areolar choroidal dystrophy, Kuparara kwechoroidal atrophy uye Pigmented inopisa retinochoroidal atrophy ndeye mienzaniso yeiyrosty dystrophies. Kurasika kwakanyanya kwemaono kunogona kuitika kune dzimwe dzei dystrophies.
Chorioretinitis ndiyo chirwere chinonyanya kurwisa chinorwisa choroidea. Rudzi urwu rwekuputika runowanzoita kuti rive nerima rakasviba uye chiratidzo chisina kunaka. Vana vaduku uye vanhu avo vari kurwa neHerpes Simplex Virus vanowanzobatwa nehosha iyi. Mishonga inorwisa mabhakitiriya uye corticosteroids inowanzoshandiswa kugadzirisa kurwisa chorioretinitis.