I-Arcus senilis iyindandatho emhlophe okanye emhlophe ye-opaque okanye i-arc ecaleni kweso. I-cornea isakhiwo esicacileyo, esifana nesidanga esempilweni yangaphambili yeso. I-cornea yenziwe ngamacandelo ahlukeneyo angama-6 yaye ngokuqhelekileyo ibala. I-cornea inika inxalenye enkulu yamandla okukhanyela kweso ukuze imibala ekhanyayo ifike ngokufanelekileyo kwi-retina. U-Arcus senilis ubonakala ekhulile, kodwa ngamanye amaxesha ukhona xa ezalwa.
Xa i-arcus senilis ikhula ebomini okanye ebomini ubomi, ibhekiselwa ku-arcus juvenilis. I-arc okanye intambo eyenzeka nge-arcus senilis ivela kwi-lipids (amafutha) okanye i-cholesterol efakwe kwi-cornea.
Izizathu
I-Arcus iyakuthi ikhule kuyo yonke amehlo ethu xa siphila ixesha elide. Kwabaninzi abantu, i-arcus ibonakalisa kwaye ayiyi kuphazamisa umbono. Nangona kunjalo, xa i-arcus ikhula kubantu abancinci kwiminyaka engama-40 ubudala, kukho isizathu sokukhathazeka. Ngenxa yokuba i-deposit iipasiti zeepidids, ukuba unayo i-arcus kwaye ungaphantsi kwemashumi mane, ingaba ngamanqanaba aphezulu egazini le-lipid kwaye ngoko ke i-cholesterol ephezulu.
Ukuqhagamshelana phakathi kwe-arcus kunye ne-cholesterol ephezulu okanye i-atherosclerosis sele iphikisana kakhulu. Kudala ngo-1852, isazi sezilwanyana saseJamani uRudolf Virchow sathetha umbutho phakathi kwe-acne ne-atherosclerosis. Nangona kunjalo, malunga neminyaka engama-40 kamva, ugqirha uWilliam Osler wacetyisa ukuba i-arcus yayingekho ukuxilongwa "kokuhlutha kwamanzi" entliziyweni.
Kwanje, ikhonkco phakathi kwe-arcus kunye ne-vascular lipid deposits iphikisana kakhulu. Ngo-2008, iiNational Institutes of Health zashicilele isihloko esaphetha ngokuthi: "I-corneal arcus ibonisa i-lipid yokufakela i-lipid deposit kwaye ihambelana ne-calcific atherosclerosis kunye ne-xanthomatosis kwezi zi gulane.
Izigulane ezinomdla ogqithiseleyo ziba ne-calcific atherosclerosis. I-Corneal arcus ... ikhombisa ukunyuka kwe- atherosclerosis kulezi zigulane ze-hypercholesterolemic. "
Ukuxilongwa
Xa ogqirha benza iimviwo zamehlo , kukho izinto ezininzi eziqwalaselwa phambi kokuhlola. Ngokomzekelo, xa ugqirha ebona umntu osemncinci, baya kuqwalasela ngokugqithiseleyo iziphumo zabo kwi-retina. Ngexesha loviwo, iliso ekhethekileyo iliso liya kufakwa kwijiso ukuze linciphise umfundi. Xa iliso lihlanjululwa, imitha yegazi yokubuyisela ihlolwe iinjongo zesifo. Ukubonakala kweempahla zegazi kunye nobukhulu bungenza izikhokelo kumanqanaba aphakamileyo aphezulu kunye ne-atherosclerosis. Ukuba kubonakala sengathi kune-atherosclerosis yeemitha zegazi, kunye nesigulane senzeke nokuba ne-arcus, ngoko ke kunokwenzeka ukuba uya kuncomela ukutyelela ugqirha wakho oyintloko, ugqirha okanye u-cardiologist.
Unyango
Ayikho indlela enhle yokwenza i-arcus ihambe. Abanye baye bathetha ukuba tattoo ibone ukusikhusela. Nangona kunjalo, inxalenye enkulu, oku akukhuthazwa kuluntu lwezonyango.
Oko Okufanele Uyazi
Uninzi lwagqirha lwamehlo lenza umgaqo oqhelekileyo engqondweni xa kufike kwi-arcus.
Kwizigulane ezingaphezu kweminyaka emashumi mane ubudala, i-arcus yisoloko isisombululo sokuthoba. Nangona kunjalo, ukuba uneminyaka engaphezu kwemashumi mane, jonga ugqirha wakho weentsapho kwaye ubuncinci ube nomgangatho wegazi le-cholesterol. Ngenxa yokuba uncinci kuneminyaka engamashumi amane kwaye unesisombululo, akuthethi ukuba uye waphakamisa amanqanaba eepidid, kodwa ngobuncinci kakhulu, kucetyiswa ukuba uhlolisise.
Eyaziwayo Njengaye: Arcus senilis corneae