Tinowanzofunga nezvekubatanidza lensisheni semashonga ezvokurapa zviri nyore kuti tigadzirise matambudziko edu ekuona. Kutaura zvazviri, kutumira lenzi kwakawanda uye kwakapararira munyika yose iyo vanhu vanovatarisa semari pane zvigadzirwa zvemishonga. Asi nhasi, kuonana nemakisi ari kushandiswa kurapa zvinetso zvemaziso zvakanyanya zveutano. Kwenguva yakareba, vanachiremba vemaziso vakashandisa "bandage contact lens" kuti vabate matambudziko eziso se filamentary keratitis, kazhinji epithelial erosions uye corneal defects uye abrasions.
Munguva pfupi ichangopfuura, masangano ekutengesa lens akadai seProkera ari kuunza kuporesa maitiro kune cornea kuburikidza neamniotic tissue. I amniotic tissue inotorwa kubva mu-placenta uye inoshandiswa kugadzira rudzi rwebhanhire rekugadzira kubatsira mukurapa cornea. Zvisinei, vatsvakurudzi vatanga kushandisa mashizha ekubatsira kubatsira tsika uye masero ane utano kune varwere. Izvi zvinokonzerwa nesero-rich lenses iri kushandiswa kurapa zvirwere zvakanyanya zvemaziso.
Ndezvipi Masero Anonzi?
Masero emakumbo masero mumuviri wedu asingabatsiri uye kumirira kuchinjwa kuti ave masero akajeka kuti aite mamwe mabasa. Kune mhando mbiri dzemasero emadziro: embryonic stem masero uye mashizha emashizha makuru (dzimwe nguva anonzi somatic stem masero.) Aya masero anokwanisa kusiyanisa mumasero akasiyana-siyana akadai seganda, ziso, nerve uye masiseri masero. Masero evanhu vakuru anowanika munzvimbo dzakawanda mumuviri uye anogara akasara kusvikira zvirwere kana kukuvara kwepanyama zvichiitika.
Vanobva vazosiyanisa mumasero akasiyana-siyana kuti vatore mhuka. Vanofungidzirwa kuti vanogona kugovana nekuzvinyora ivo nokusingaperi.
Kusiyana neizvi, embryonic stem masero anobva chete kubva pamakore mana emakore ekuberekwa kwevanhu. Kana yakashandiswa pakutsvakurudza, inogadzirwa mu laboratori uye haina kuwanikwa zvakananga kubva kuvanhu.
Embryonic stem masero anokwanisa kusiyanisa mune chero mhuka dzemuviri wemunhu, asi masero mashoma masero anongopera kune zvaanogona kukura kuva. Kakavhiringidzika kune hupoteredza kushandiswa kwemasero emadziro ekurapa, asi izvi zvinowanzobatanidza embryonic stem cells, sezvo mashizha evanhu vakuru anogona kuwanikwa zvakananga kubva mumuviri uye kusabatanidza mazamu evanhu zvachose.
Chinoshanda sei?
Iyo iri nyore uye isingadhuri, nzira yacho haisi yekusvibisa uye haidi kushandiswa kwevanhu vepanyama kunze kwenyika kana zvigadzirwa zvemhuka. Chinhu chiduku zvikuru chezvisikwa kubva kumeso omurwere zvinokohwa kuti zvive masero. Izvo zvinoshandiswa paLAA-inogamuchirwa majekiti ekubatanidza hydrogel. Aya masero anomererwa uye akura mumurwere wega serum.
Masero emadzimai anokura nokukurumidza uye anofukidza pamusoro penhare inobatanidza munyaya yevhiki mbiri kusvika kutatu. Apo lens iri kuiswa paziso rerwere, masero anotamira ku cornea nenzira iyo masayendisiti haasati anzwisisa. Masero aya akatanga kukura nekugadzirisa hutsva hutsva hwemasero anokwanisa kutarisira kudzorera chiratidzo nekugadzirisa maziso ekuona kwemaziso. Iko lensi inogona kuva yakawanda. Hakune sutures uye hapana mhando dzakashata dzinodiwa kupedzisa nzira yacho.
Mishonga inoshandiswa kare inoshandisa masero emadzimai anobatanidza kusungirira masero muziso kuburikidza nekupa mhuka dzevanhu dzakapiwa.
Zvisinei, kubudirira kwehuwandu hunosiyana uye kunogona kukundikana mushure memakore mashomanana apo ziso rekuporesa haigone kuchengeta masero emadzi. Kushandisa masero emukati emurwere panzvimbo pemasero emapazi anogona kupa zvido zvekuramba. Izvi zvingava zvakanyanya kubatsira mumamiriro ezvinhu umo mabhizinesi emagetsi anowanzopera kana asina kuwanikwa, kana munzvimbo dzisina makamba emakona ekutsvaga. Zvitsva zvitsva zvinoshandiswa zvinoshandiswa zvinoshandisa mapepa eimba uye zvinodzivirira masero ekudzivirira.
Chii Chinonzi Cell Cell Stem Contact Lenses Kuchengetedzwa?
Kubatana nemapirosi akatakurwa nemasero emadziro anonyanya kurongwa mukurapa kushungurudzika kwekornea , yakajeka dome-sarudzo yakatarisana necheperi kweziso.
Kukuvara kwekakorama kunowanzosangana nechokunze kwema-cornea, epithelial cells, uye inogona kukonzerwa nemakumbo kubva pakuvhiyiwa, zvinotyisa, zvirwere, zvizvarwa zvinokonzerwa nehutachiona uye kupisa kubva pameso akaoma. Zviratidzo zveorne corneal zvinosanganisira kurwadziwa, kuputika, kuchinja kwemaonero uye kunzwisa chiedza.
Chimwe chinonyanya kukosha chinoshandiswa ne stem cell chinokura mavara lens is limbal stem cell deficiency. Limbal stem cell kusakundikana kunogona kukonzerwa nekushungurudzika kubva pamakemikari anopisa, kupisa kwemafuta uye chibereko chinonzi congenital aniridia. Zvinotoshamisa kuti vanachiremba vari kuona kuwedzera kwevarwere vane chimbaridzo stem cell kusakosha kubva kune dzimwe nzvimbo dzakadai sekugara kwenguva refu-lens kupfeka, maziso epamusoro-soro akadai seasingaperi ane ziso rakaoma , chirwere chechipatara uye dzimwe chirongwa che glaucoma uye pterygium.
> Kwakabva:
> Di Girolamo, Nick. A Kutarisa Lens-Based Technique Yokuwedzera uye Kudyarwa kweAustologous Epithelial Progenitors yeOcular Surface Reconstruction. Transplantation , 2009.