Keratoconus

Keratoconus chirwere cheziso chinokanganisa chimiro chekornea. Iyo cornea ndiyo yakajeka tishu inovhara kumberi kweziso.

Nemamiriro aya, chimiro chekonora chinoshanduka zvishoma nezvishoma kubva pachimiro chinotenderera kuenda kuchimiro chekoni. Izvo zvinowedzerawo kuonda uye ziso rinobuda kunze. Izvi zvinokonzera matambudziko ekuona. Muvanhu vazhinji, shanduko idzi dzinoramba dzichitowedzera.

Chikonzero hachizivikanwe. Zvichida kuti maitiro ekuvandudza keratoconus aripo kubva pakuzvarwa. Mamiriro acho anogona kunge ari nekuda kwekukanganisa mu collagen. Ichi chidimbu chinopa chimiro uye simba kune cornea.

Allergy uye kukwiza maziso kunogona kukurumidza kukuvadza.

Pane hukama pakati pe keratoconus uye Down syndrome.

Chiratidzo chekutanga kupomhodza kudiki kwemaonero asingakwanise kugadziriswa nemagirazi. (Chiono chinowanzo gadziridzwa kusvika 20/20 neakaomarara, gasi-anokwanisa kubatika malensi.) Nekufamba kwenguva, iwe unogona kuona halos, kupenya, kana mamwe matambudziko ekuona usiku.

Vazhinji vanhu vanokudziridza keratoconus vane nhoroondo yekuve pedyo kuona. Kuona padyo kunowedzera kuwedzera nekufamba kwenguva. Dambudziko parinowedzera, astigmatism inokura uye inogona kuwedzera nekufamba kwenguva.

Keratoconus inowanzo kuwanikwa mukati memakore ekuyaruka. Inogona zvakare kukura muvanhu vakura.

Chiyero chakanyatsonaka cheichi chinetso chinonzi corneal topography, iyo inogadzira mepu yeiyo curve yekona.

Kuongorora-mwenje kuongorora kwecornea kunogona kuongorora chirwere mumatanho ekupedzisira.

Chiyero chinonzi pachymetry chinogona kushandiswa kuyera ukobvu hwecnea.

Kubata lenzi ndiyo yekurapa kukuru kune vazhinji varwere vane keratoconus. Iwo malenzi anogona kupa maonero akanaka, asi haarape kana kumisa mamiriro acho. Kune vanhu vane chirwere ichi, kupfeka magirazi ezuva kunze mushure mekuonekwa kuti kunogona kubatsira kunonoka kana kudzivirira kufambira mberi kwechirwere. Kwemakore mazhinji, kurapwa chete kwekuvhiya kwave kuisirwa corneal.

Aya matekinoroji matsva anotevera anogona kunonoka kana kudzivirira kudiwa kwekuiswa kwemakorne:

• Yakakwira-frequency redhiyo simba (conductive keratoplasty) inoshandura chimiro chekornea kuitira kuti malensi ekutaurirana akwane zviri nani.
• Corneal implants (zvikamu zvemukati zvemhete) chinja chimiro chekonora kuitira kuti malensi ekutaurirana akwane zviri nani
• Corneal collagen kuyambuka-kubatanidza kurapwa kunokonzera kuti cornea ive yakaoma. Muzviitiko zvakawanda, zvinodzivirira mamiriro kubva pakuwedzera kuipa. Izvo zvinogona ipapo kuve zvinogoneka kuumbiridza iyo cornea ne laser kuona kururamisa.

Muzviitiko zvakawanda, chiratidzo chinogona kugadziriswa neyakaomarara gasi-inobvumidzwa lenzi lenzi.

Kana kuchenesa kwemakona kuchidikanwa, mhedzisiro inowanzo kuve yakanaka. Nekudaro, iyo yekudzoreredza nguva inogona kuve yakareba. Vanhu vazhinji vachiri kuda malensi ekuonana mushure mekuvhiyiwa.

Kana ikasiiwa isina kurapwa, iyo cornea inogona kutetepa kusvika padanho apo gomba rinokura mune yakatetepa chikamu.

Pane njodzi yekurambwa mushure mekuiswa kwechironda chemukoko, asi njodzi yacho yakadzikira zvakanyanya pane kune dzimwe nhengo dzinoiswa.

Iwe haufanire kunge uine laser yekuona kururamisa (senge LASIK) kana iwe uine chero dhigirii rekeratoconus.Corneal topography inoitwa zvisati zvaitika kutonga vanhu vane mamiriro aya.

Muzviitiko zvisingawanzoitika, mamwe maitiro ekururamisa laser, akadai sePRK, anogona kuve akachengeteka kune vanhu vane keratoconus nyoro. Izvi zvinogona kuve zvichikwanisika kune vanhu vane corneal collagen kuyambuka-kubatanidza.

Vechidiki vane maonero asingakwanise kugadziriswa kusvika 20/20 nemagirazi anofanirwa kuongororwa nachiremba weziso anoziva nekeratoconus. Vabereki vane keratoconus vanofanirwa kufunga nezvekuti vana vavo vaongororwe chirwere ichi kutanga pazera regumi.

Iko hakuna nzira yekudzivirira iyi mamiriro. Vazhinji vanopa rubatsiro rwehutano vanotenda kuti vanhu vanofanirwa kutora matanho ekudzivirira kusagadzikana uye kudzivirira kukwiza maziso avo.

Chiono shanduko - keratoconus

• Cornea

Hernández-Quintela E, Sánchez-Huerta V, García-Albisua AM, Gulias-Cañizo R. Preoperative kuongororwa kwekeratoconus uye ectasia. Mune: Azar DT, rakanyorwa. Refractive Kuvhiya. 3rd ed. Philadelphia, PA: Elsevier; 2020: chits. 12.

Hersh PS, Inokanganisa RD, Muller D, Durrie DS, Rajpal RK; United States Crosslinking Yekudzidza Boka. United States Multicenter Clinical Trial yeCorneal Collagen Crosslinking yeKeratoconus Kurapa. Ophthalmology. 2017; 124 (9): 1259-1270. PMID: 28495149 pubmed.ncbi.nlm.nih.gov/28495149/.

Shuwa J, Garcia-Zalisnak DE. Keratoconus uye mamwe ectasias. Mune: Yanoff M, Duker JS, eds. Ophthalmology. 5 ed. Philadelphia, PA: Elsevier; 2019: chitsiko 4.18.