Funda Ngeentlobo ezininzi zeCataracts
Nangona yonke i- cataract iquka ukuguqulwa kwelensi yamehlo, iintlobo ezininzi ze-cataract zikhoyo. I-Cataracts ingahlakulela ngenxa yokuguga okanye ibonakale kusenokwenzeka ebomini. Izigaba ezahlukeneyo ze-lens zinokuchaphazeleka ngaphezu kwamanye. Oogqirha bamajoni bahlela i-cataract ngokubhekiselele kwindawo yabo kunye nemvelaphi yabo.
Iintlobo ze-Cataracts ngeNdawo
Ii-cataracts zihlelwa oogqirha ngokubhekiselele kwindawo yokuvula, okanye i-clouding, ye-lens.
Nuclear Sclerotic Cataract
I-cataract ye-nyukliya yeyona nyukliya iyona hlobo oluqhelekileyo lwe-cataract ehlobene neminyaka. Olu hlobo lwe-cataract lubangela ukukhanya okuluhlaza okwesibhakabhaka nokuqina kowomyinge ophakathi kwilensi ebizwa ngokuba yinucleus. Izinguqu kumbono zidla ngokugqithiseleyo.
Kwezinye iimeko, izigulane ziyakubona ukuphucula kwangempela kwimiboniselo engaphambi kokuba umbono wabo uhlahloke kwizinga elithile. Ebhekiselwe "njengesihlandlo sesibini ," eli nqanaba lisoloko lusexeshana kuphela.
UCataract Cortical
I- cataract ye-cortical ibonakala ngathi i-opacity ephahlakayo kwinxalenye yelensi ebizwa nge-cortex. I-cortex inomyinge, okanye inxalenye yangaphandle, ye-lens. Ezi nkathazo zihlala zifana neengxoxo zamahavili ezongena ngaphakathi kwinqanaba le lensi. Ukukhanya kudla ukusabalalisa xa kushaya ii-opacities ezinjengeentetho.
Cataract Posterior Subcapsular
Ngokuqhelekileyo okubizwa ngokuba yi-PSC, i-cataract yangasemva engaphantsi kwe-cataract yinto evulekileyo eqhubekayo emlenzeni ongasemva kwe-lens, ngokukhawuleza phantsi kwe-lens esikhwameni se-lens that houses the lens.
Olu hlobo lwe-cataract lubangela uvelwano olukhanyayo, lufuduze kumboniso osondeleyo, kunye ne-glare kunye ne-halos malunga nezibane. Ziqhelekile kwizigulana zesifo sikashukela kunye nezigulane ezithathile iindawo zokuhlala ixesha elide.
Iintlobo ze-Cataracts ngokusuka
Oogqirha bamajoni bahlula i-cataract ngokuya kwimvelaphi yabo.
Cataract ehlobene nobudala
Uninzi lwe-cataracts lukhula njengoko sibudala. Nangona iimpawu zingabonwa ngokukhawuleza xa uqala ukuya kuma-40 ukuya kuma-50s, i-cataract ngokuvamile ayibonakali kude kube sekupheleni kweminyaka yama-60 okanye ye-70.
Cataract Secondary
Ngezinye izihlandlo i-Cataracts ikhula emva kokuhlinzwa, njengokwenziwa ngophengululo lwe- glaucoma okanye ukuhlinzwa okwenziwa ngama-retinal. Iziguli ezinesifo sikashukela maxa wambi zihlakulela i-cataracts ngaphambili kweqhelekileyo. Kwakhona, izigulane ezithatha i-steroids ixesha elide liyakhula.
Cataract ehlekisayo
Ngezinye iinkqubo i-cataracts ibangelwa kukulimala ngqo okanye ukuxhwaleka kweso. I-Cataracts ingahlakulela ngokukhawuleza okanye emva kwempikiswano eyonakalisa iliso. I-trayatic cataract ivele ivele emva kokuxhatshazwa ngokugqithiseleyo kwiso okanye ukusukela kwimichiza ethile.
Abanye abantwana bazalwa benesifo sengqondo. Kwezinye iimeko, i-cataract ifa ayibalulekanga ngokwaneleyo ukuchaphazela umbono. Ukuba kubalulekile ukuba kunjalo, i-cataract kufuneka isuswe ukwenzela ukuphepha iingxaki zombono, ezifana ne- strabismus okanye i- amblyopia .
I-Cataract yamayeza
Nangona ngezinye iinkathazo, ama-cataracts athile emva kokuba bevelele kwiintlobo ezithile zemitha. Olu hlobo lwe-cataract lungabangelwa ekubeni lukhanyise ukukhanya kwe-ultraviolet ukusuka elangeni kunye nezinye iindidi zemitha.
Umthombo:
Umbutho we-American Optometric. "Isikhokelo seKlinikhi yokuSebenza: Ukunyamekela kwabaMguli abaneMali kunye neCataract." I-American Optometric Association, ngo-1995.