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Malenzi anogona kupfekwa ne astigmatism?
Astigmatism chirwere chemaziso chaimo umo pasina imwe nzvimbo yekutarisa maranzi pane retina. Izvi zvinokonzerwa nekusagadzikana kwechimiro chekona, uye zvishoma zvishoma - chimiro che lens.
Iyo yakajairika cornea ine yakatsetseka yakatsetseka yakaita denderedzwa. Asi ne astigmatism, pamusoro pe cornea ine anatomical features - haina kukwana, kwete spherical muchimiro. Iyo ine toric chimiro pakati, saka nzira dzakajairwa dzekugadzirisa kwekuona nekuona lenzi hazvishande kumurwere.
Contact lens ave achishandiswa muophthalmology kwenguva yakareba, asi kusvika munguva pfupi yapfuura haana kukurudzirwa kune varwere vane astigmatism. Izvi zvinokonzerwa nekuti nekuda kwekuremara kana kuomarara kwekuona, kukwana kwakazara pane cornea yeyakajairwa lenzi yekugadzirisa kuona kwevarwere vane astigmatism kwaive kwakaoma. Malenzi akajairwa evarwere ava haana kupa mhedzisiro yaaida, akaunza kusagadzikana panguva yekushandiswa uye anogona kukuvadza mamiriro ekuona analyzer.
Nhasi, ophthalmologists vanoshandisa malenzi akakosha, toric lenzi, kugadzirisa zviri pakati nepakati uye nepamusoro dhigirii rekuona kukanganisa mune iyi pathology. Iyo yekunze kana yemukati yepamusoro ye lenses yakadaro ine chimiro chakakosha. Toric lenzi dzinogadzirisa corneal astigmatism kusvika ku6 diopters kana lens astigmatism kusvika ku4 diopters.
Ndeapi lenzi akanakira astigmatism
Kugadzirisa kukanganiswa kwekuona muhupo hwe astigmatism kunobatsirwa nekugadzirisa magirazi kana kushandiswa kwekubatanidza lenses. Paunosarudza rudzi rwekugadzirisa, zvakakosha kufunga nezvemaitiro akati wandei - iyi ndiyo mhando yeastigmatism, pamwe nedanho rayo, maitiro ekutadza kuona. Nedhigirii rakapfava, kururamisa kunogoneka nekuda kwekushandiswa kwema cylindrical lenses kana kusangana nekugadziriswa nezvigadzirwa zvine aspherical shape.
Nechimiro chakaoma che astigmatism, semuenzaniso, nemhando yayo yakasanganiswa, cylindrical lenses haigadzirise dambudziko, sezvo pathology yerefraction inogona kuperekedzwa ne hypermetropia kana myopia. Kana pane astigmatism ne myopia, mufananidzo wacho unotariswa mumapoinzi maviri, usingasviki retina. Ne astigmatism, iyo inoperekedzwa nekuona kure, mapoinzi maviri ekutarisa kwemufananidzo anoumbwa kuseri kweretina. Malenzi ane toric shape anogona kubatsira mukugadzirisa chikanganiso ichi.
Ndeupi mutsauko uripo pakati peastigmatism lenzi uye yenguva dzose lenzi?
Kugadzirisa kubata, spherical, toric, aspherical kana multifocal lenses inogona kushandiswa. Sarudzo dzechigadzirwa dzakajairwa hazvizogadzirise myopia kana hyperopia, munhu anozoona kukanganisa kwemufananidzo padivi pemufananidzo.
Aspherical lenses anogadzirisa kuona zvakanyanya zvinobudirira, kuwedzera maekona ekuona nekuda kwekunyatsokwana kune cornea uye kudzokorora chimiro chayo chisina kujairika. Malenzi akadaro anotsiva astigmatism mukati me2 diopters, asi haakwanise kugadzirisa mamwe madhigirii akaomarara. Kugadzirisa dambudziko iri, atove spherical marudzi emalenzi anoshandiswa.
Malenzi ane iyi pathology anosiyana sei kubva kune akajairwa? Vanogona kufungidzirwa sebhora rakajairika, iro rakasvinwa kubva kumativi ese nemaoko. Ipo nzvimbo yebhora yakamanikidzwa, curvature yaro inonyanya kutaurwa kupfuura kubva kumativi emativi, asi kunze kune imwe nzvimbo inoramba iri muchimiro chehemisphere. Izvo zvakafanana nemalenzi, nekuda kwechimiro chakafanana, vanogadzira maviri optical centers kamwechete. Nekupfuura kwemwaranzi yechiedza, kwete chete dambudziko guru rekuona rinogadziriswa, asiwo inofambidzana nekuona zviri pedyo kana kuona zviri kure.
Lens Fitting Tips
Muhupo hwe astigmatism, kusarudzwa kwema lens kunofanira kuitwa chete neophthalmologist. Inoyera huwandu hwezviratidzo zvakajairwa - dhayamita yelenzi, radius ye curvature, pamwe nesimba rekuona uye cylinder axis yekubata lenzi. Mukuwedzera, zvinodikanwa kuti unyatsosarudza nzira yekudzikamisa chigadzirwa muziso kuitira kuti toric lens inyatsogadziriswa pamusoro pe cornea. Chero kutama kudiki kunokonzera kukanganisa kwakanyanya mumufananidzo.
Mazuva ano toric lenses anogadzirwa achishandisa nzira dzakasiyana dzekudzikamisa:
- kuvapo kwe ballast - lens ine nzvimbo diki yekubatanidzwa munzvimbo yezasi: kana munhu akachengeta musoro wake wakatwasuka, lenzi inomira zvakanaka, asi kana musoro wakarereka. kana kuti nzvimbo yemuviri inoshanduka, lens ichachinja, chifananidzo chichatanga kusvibiswa (nhasi lenzi dzakadaro hadzisisiri kubudiswa);
- kucheka rumwe rutivi rwema lenses kuitira kuti dzigadzikane nekumanikidzwa kwechisikigo kwemaziso - zvigadzirwa zvakadaro zvinogona kufamba kana kurira, asi zvino kudzorera nzvimbo yakarurama zvakare;
- kuvapo kwe periballast - ma lenzi aya ane mipendero yakatetepa, ane zvisimbiso zvina zvibodzwa zvinobatsira kuchengetedza lenzi panzvimbo yaidiwa pasina kurambidza basa remotokari.
Ndezvipi zvingasarudzwa zve lens zvinogamuchirwa kune astigmatism
Kune akawanda marudzi emacontact lens aripo nhasi. Aya anogona kunge ari ezuva nezuva toric lenses ane yakakwirira yekunyaradza. Vanogadzirisa astigmatism mukufambirana nekuona kure uye kuona zviri pedyo.
Mwedzi wega wega lenses anoshandiswawo - akachipa kupfuura ezuva nezuva uye ane yakakwirira optical parameters.
Ongororo yevanachiremba nezve lens ye astigmatism
-Sarudzo yenzira yekugadzirisa astigmatism inoramba iine murwere, zvinoenderana nemararamiro ake, zera, basa raakaitwa, - anodaro. ophthalmologist Olga Gladkova. -Toric lenses inobvumidza iwe kuti uwane kujeka kwekuona kana uchienzaniswa neastigmatism kugadziridzwa. Usakanganwa nezve contraindications yekupfeka contact lens, zvakadai sezvirwere zvinoputika zvechikamu cheziso cheziso, yakaoma eye syndrome, kana kushandiswa kwekubatanidza lenses kusingabatanidzwi.
Mibvunzo nemhinduro dzakakurumbira
Takabvunza mibvunzo ophthalmologist Olga Gladkova nezve kupfeka lenzi pamberi peastigmatism pamwe chete nemamwe matambudziko ekuona.