Zamkatimu
Kodi magalasi amatha kuvala ndi astigmatism?
Astigmatism ndi matenda enaake a maso omwe palibe nsonga imodzi yolunjika pa retina. Izi zimachitika chifukwa cha mawonekedwe osakhazikika a cornea, ndipo nthawi zambiri - mawonekedwe a lens.
Konea yachibadwa imakhala yosalala yozungulira. Koma ndi astigmatism, pamwamba pa cornea ili ndi mawonekedwe a anatomical - ndi osakhazikika, osati ozungulira. Ili ndi mawonekedwe a toric pakati, kotero njira zowongolera masomphenya ndi ma lens sizingagwire ntchito kwa wodwalayo.
Magalasi olumikizana nawo akhala akugwiritsidwa ntchito mu ophthalmology kwa nthawi yayitali, koma mpaka posachedwa sanavomerezedwe kwa odwala omwe ali ndi astigmatism. Izi ndichifukwa choti chifukwa chakuwonongeka kwakukulu kapena kowopsa, kukwanira kwathunthu pa cornea ya magalasi wamba pakuwongolera kuwona bwino kwa odwala omwe ali ndi astigmatism kunali kovuta. Magalasi okhazikika kwa odwalawa sanapereke zomwe amafunikira, adabweretsa kusapeza pakagwiritsidwe ntchito ndipo amatha kukulitsa mkhalidwe wa wowunikira.
Masiku ano, ophthalmologists amagwiritsa ntchito magalasi apadera, ma lens toric, kuti akonze zolakwika zapakatikati komanso zapamwamba panjira iyi. Kunja kapena mkati mwa magalasi oterowo ali ndi mawonekedwe apadera. Ma lens amawongolera corneal astigmatism mpaka 6 diopters kapena lens astigmatism mpaka 4 diopters.
Ndi magalasi ati omwe ali abwino kwa astigmatism
Kuwongolera kuwonongeka kwamaso pamaso pa astigmatism kumathandizidwa ndi magalasi owongolera kapena kugwiritsa ntchito magalasi olumikizirana. Posankha mtundu wa kuwongolera, ndikofunikira kuganizira njira zingapo - uwu ndi mtundu wa astigmatism, komanso gawo lake, mawonekedwe a kuwonongeka kwamaso. Ndi digiri yofatsa, kuwongolera kumatheka chifukwa chogwiritsa ntchito magalasi a cylindrical kapena kuwongolera kulumikizana ndi zinthu zokhala ndi mawonekedwe a aspherical.
Ndi mtundu wovuta wa astigmatism, mwachitsanzo, ndi mtundu wake wosakanikirana, magalasi a cylindrical sangathetse vutoli, chifukwa matenda a refraction amatha kutsagana ndi hypermetropia kapena myopia. Ngati pali astigmatism ndi myopia, chithunzicho chimayang'ana pa mfundo ziwiri, osati kufika pa retina. Ndi astigmatism, yomwe imatsagana ndi kuyang'ana patali, mfundo ziwiri za chithunzicho zimapangidwa kuseri kwa retina. Magalasi okhala ndi mawonekedwe a toric angathandize kukonza vutoli.
Kodi pali kusiyana kotani pakati pa magalasi a astigmatism ndi magalasi okhazikika?
Kuti muwongolere kulumikizana, magalasi ozungulira, ozungulira, a aspherical kapena multifocal angagwiritsidwe ntchito. Zosankha zodziwika bwino sizingagwirizane ndi myopia kapena hyperopia, munthu amawona kupotoza kwa chithunzicho pamphepete mwa chithunzicho.
Magalasi a aspherical amawongolera bwino kwambiri, kukulitsa ma angles owonera chifukwa chakukwanira bwino kwa cornea ndikubwereza mawonekedwe ake osawoneka bwino. Magalasi oterowo amalipira astigmatism mkati mwa 2 diopters, koma sangathe kukonza madigiri owopsa. Kuti athetse vutoli, magalasi amitundu yozungulira kale amagwiritsidwa ntchito.
Kodi ma lens omwe ali ndi matenda awa amasiyana bwanji ndi wamba? Amatha kuganiziridwa ngati mpira wamba, womwe udafinyidwa mbali zonse ndi manja. Kumene pamwamba pa mpirawo amapanikizidwa, kupindika kwake kumawonekera kwambiri kusiyana ndi mbali za mbali, koma kunja kumakhalabe pamwamba pa mawonekedwe a hemisphere. N'chimodzimodzinso ndi magalasi, chifukwa cha mawonekedwe ofanana, amapanga malo awiri opangira nthawi imodzi. Ndi kudutsa kwa kuwala kwa kuwala, osati vuto lalikulu la masomphenya lomwe limakonzedwa, komanso kuyang'ana pafupi kapena kuyang'ana patali.
Malangizo Opangira Ma Lens
Pamaso pa astigmatism, kusankha magalasi kuyenera kuchitidwa kokha ndi ophthalmologist. Imayesa zizindikiro zingapo zofananira - ma lens awiri, radius ya kupindika, komanso mphamvu ya kuwala ndi cylinder axis for contact lens. Kuphatikiza apo, ndikofunikira kusankha bwino njira yokhazikitsira mankhwala m'maso kuti mandala a toric akhazikike bwino pamwamba pa cornea. Kusamuka kulikonse kumayambitsa kuwonongeka kwakukulu kwa chithunzicho.
Ma lens amakono a toric amapangidwa pogwiritsa ntchito njira zingapo zokhazikika:
- kukhalapo kwa ballast - mandala ali ndi kachigawo kakang'ono kamene kali m'mphepete mwa m'munsi: ngati munthu asunga mutu wake molunjika, lens idzayima bwino, koma pamene mutu wapendekeka. kapena malo a thupi amasintha, magalasi adzasuntha, chithunzicho chidzayamba kusokoneza (lero magalasi oterowo sakupangidwanso);
- kudula m'mphepete mwa magalasi kuti akhazikike ndi mphamvu yachilengedwe ya zikope - zinthu zoterezi zimatha kusuntha pamene zikuwombera, koma kenaka kubwezeretsanso malo oyenera;
- kukhalapo kwa periballast - magalasi awa ali ndi m'mbali zoonda, ali ndi mfundo zinayi zosindikizira zomwe zimathandiza kuti lens ikhale pamalo omwe mukufuna popanda kuletsa ntchito zamagalimoto.
Zosankha za mandala ndizovomerezeka pa astigmatism
Pali mitundu yambiri ya ma lens omwe alipo lero. Izi zitha kukhala ma lens a toric tsiku lililonse okhala ndi chitonthozo chapamwamba. Amakonza astigmatism mogwirizana ndi kuona patali ndi kuyang'anira pafupi.
Magalasi a mwezi uliwonse amagwiritsidwanso ntchito - ndi otsika mtengo kusiyana ndi tsiku ndi tsiku ndipo ali ndi mawonekedwe apamwamba.
Ndemanga za madokotala za magalasi a astigmatism
- Kusankha njira yothetsera astigmatism kumakhalabe ndi wodwalayo, zimatengera moyo wake, zaka zake, ntchito yake, - akuti ophthalmologist Olga Gladkova. - Ma lens a Toric amakupatsani mwayi wowona bwino poyerekeza ndi kuwongolera kowoneka bwino kwa astigmatism. Musaiwale za contraindications kuvala magalasi, monga matenda yotupa a anterior gawo la diso, youma diso syndrome, pamene ntchito magalasi kuchotsedwa.
Mafunso ndi mayankho otchuka
Tinafunsa mafunso ophthalmologist Olga Gladkova za kuvala magalasi pamaso pa astigmatism kuphatikiza ndi mavuto ena a masomphenya.