Okuqukethwe
Ingabe amalensi angagqokwa nge-astigmatism?
I-Astigmatism yisifo esithile se-ophthalmic lapho kungekho khona iphuzu elilodwa lokugxilisa imisebe ku-retina. Lokhu kungenxa yokuma okungavamile kwe-cornea, futhi kancane kancane - ukuma kwe-lens.
I-cornea evamile ine-spherical surface ebushelelezi. Kodwa nge-astigmatism, ingaphezulu le-cornea linezici ze-anatomical - ayijwayelekile, ayindilinga ngesimo. Inomumo we-toric phakathi nendawo, ngakho-ke izindlela ezijwayelekile zokulungiswa kombono ngamalensi okuxhumana ngeke zisebenze esigulini.
Ama-contact lens asetshenziswe isikhathi eside ku-ophthalmology, kodwa kuze kube muva nje ayenganconywa ezigulini ezine-astigmatism. Lokhu kungenxa yokuthi ngenxa yokukhubazeka okubonakalayo okunzima noma okunzima, ukulingana okugcwele ku-cornea yamalensi ajwayelekile ukuze kulungiswe ukungaboni kahle kokubukwa ezigulini ezine-astigmatism kwakunzima. Ama-lens ajwayelekile alezi ziguli awazange anikeze umphumela oyifunayo, alethe ukungakhululeki ngesikhathi sokusetshenziswa futhi angabhebhethekisa isimo se-analyzer ebonakalayo.
Namuhla, izazi zamehlo zisebenzisa amalensi akhethekile, ama-toric lens, ukulungisa ukukhubazeka okubonakalayo okumaphakathi kanye nezinga eliphezulu kule pathology. Ubuso obungaphandle noma obungaphakathi bama-lens anjalo bunomumo okhethekile. Amalensi e-Toric alungisa i-corneal astigmatism kufika ku-6 diopters noma i-lens astigmatism kufika ku-4 diopters.
Imaphi ama-lens angcono kakhulu e-astigmatism
Ukulungisa ukukhubazeka okubukwayo phambi kwe-astigmatism kusizwa izibuko zokulungisa noma ukusetshenziswa kwamalensi okuxhumana. Uma ukhetha uhlobo lokulungiswa, kuyadingeka ukucabangela izinqubo eziningana - lolu uhlobo lwe-astigmatism, kanye nesiteji salo, izici zokukhubazeka okubukwayo. Ngezinga elincane, ukulungiswa kungenzeka ngenxa yokusetshenziswa kwamalensi angama-cylindrical noma ukulungiswa kokuxhumana nemikhiqizo enomumo we-aspherical.
Ngendlela eyinkimbinkimbi ye-astigmatism, isibonelo, ngohlobo lwayo oluxubekile, amalensi angama-cylindrical ngeke axazulule inkinga, ngoba i-pathology yokuphindaphinda ingase ihambisane ne-hypermetropia noma i-myopia. Uma kukhona i-astigmatism ne-myopia, isithombe sigxile kumaphuzu amabili, singafinyeleli ku-retina. Nge-astigmatism, ehambisana nokubona kude, amaphuzu amabili okugxila kwesithombe akhiwa ngemuva kwe-retina. Amalensi anomumo we-toric angasiza ekulungiseni lesi sici.
Uyini umehluko phakathi kwamalensi e-astigmatism namalensi avamile?
Ukulungisa othintana naye, amalensi ayindilinga, ayindilinga, ama-aspherical noma ama-multifocal angasetshenziswa. Izinketho zomkhiqizo ezijwayelekile ngeke zibhekane ne-myopia noma i-hyperopia, umuntu uzobona ukuhlanekezela kwesithombe endaweni yesithombe.
Amalensi aspherical alungisa ukubona ngempumelelo kakhulu, anweba ama-engeli okubuka ngenxa yokulingana kahle kwe-cornea nokuphinda umumo wawo ongajwayelekile. Amalensi anjalo anxephezela i-astigmatism ngaphakathi kwama-diopter ama-2, kodwa awakwazi ukulungisa amadigri anzima kakhulu. Ukuxazulula le nkinga, kusetshenziswa izinhlobo eziyisiyingi zamalensi kakade.
Amalensi anale pathology ahluke kanjani kwejwayelekile? Bangacatshangwa njengebhola elijwayelekile, elakhanywa nhlangothi zombili ngezandla. Lapho ingaphezulu lebhola licindezelwe, ukugoba kwalo kugqame kakhulu kunaseceleni, kodwa ngaphandle kusala indawo esesimweni se-hemisphere. Kuyafana namalensi, ngenxa yokuma okufanayo, akha izikhungo ezimbili ze-optical ngesikhathi esisodwa. Ngokudlula kwemisebe yokukhanya, akuyona nje inkinga enkulu yokubona elungiswayo, kodwa nokubona eduze okuhambisana nayo noma ukubona kude.
Amathiphu Okufaka Amalensi
Lapho kukhona i-astigmatism, ukukhethwa kwamalensi kufanele kwenziwe kuphela yi-ophthalmologist. Ilinganisa inani lezinkomba ezijwayelekile - ububanzi be-lens, i-radius of curvature, kanye namandla optical kanye ne-cylinder axis yamalensi okuxhumana. Ngaphezu kwalokho, kuyadingeka ukukhetha ngendlela efanele indlela yokusimamisa umkhiqizo esweni ukuze i-toric lens igxilwe ngokucacile ebusweni be-cornea. Noma yikuphi ukususwa endaweni encane kubangela ukuwohloka okubukhali kwesithombe.
Amalensi wesimanje we-toric akhiqizwa kusetshenziswa izindlela ezahlukahlukene zokuzinzisa:
- ukutholakala kwe-ballast - i-lens inendawo encane yokuhlanganiswa endaweni yomngcele ophansi: uma umuntu egcina ikhanda lakhe liqondile, i-lens izoma ngendlela efanele, kodwa lapho ikhanda litshekile. noma isimo somzimba siyashintsha, ama-lens azoshintsha, isithombe sizoqala ukufiphala (namuhla ama-lens anjalo awasakhiqizwa);
- ukusika umkhawulo othile wama-lens ukuze uzinze ngokucindezela kwemvelo kwamajwabu amehlo - imikhiqizo enjalo inganyakaza lapho icwayiza, kodwa bese ibuyisela isikhundla esifanele futhi;
- ubukhona be-periballast - lawa ma-lens anemiphetho emincane, anamaphuzu amane okuqinisa asiza ukugcina i-lens endaweni oyifunayo ngaphandle kokukhawulela umsebenzi wemoto.
Yiziphi izinketho zamalensi ezamukelekayo ku-astigmatism
Kunezinhlobo eziningi zamalensi okuxhumana atholakalayo namuhla. Lezi zingaba ama-toric lens nsuku zonke ngezinga eliphezulu lokunethezeka. Balungisa i-astigmatism ngokuhambisana nokubona kude kanye nokubona eduze.
Ama-lens anyanga zonke nawo asetshenziswa - ashibhile kunansuku zonke futhi anemingcele ephezulu ye-optical.
Izibuyekezo odokotela mayelana lens for astigmatism
- Ukukhethwa kwendlela yokulungisa i-astigmatism kuhlala nesiguli, kuncike endleleni yakhe yokuphila, iminyaka, umsebenzi owenziwayo, - uthi udokotela wamehlo u-Olga Gladkova. - Amalensi e-Toric akuvumela ukuthi uthole umbono ocacile uma uqhathaniswa nokulungiswa kombukwane we-astigmatism. Ungakhohlwa mayelana ne-contraindication yokugqoka ama-lens othintana naye, njengezifo ezivuthayo zengxenye yangaphambili yeso, i-syndrome yeso elomile, lapho ukusetshenziswa kwamalensi okuxhumana kungabandakanywa.
Imibuzo nezimpendulo ezidumile
Sabuza imibuzo udokotela wamehlo u-Olga Gladkova mayelana nokugqoka ama-lens phambi kwe-astigmatism ngokuhlanganiswa nezinye izinkinga zombono.