Kodi presbyopia ndi chiyani?
"Presbyopia" ndizochitika zodziwika bwino za thupi ndipo zimagwirizana ndi mandala.Magalasi a crystalline ndi zotanuka.Imakhala ndi elasticity yabwino ikakhala yachichepere.Diso la munthu limatha kuwona pafupi ndi kutali kudzera mukusintha kwa lens ya crystalline.Komabe, pamene m'badwo ukuwonjezeka, mandala crystalline pang'onopang'ono kuumitsa ndi thickening, ndiyeno elasticity amafooka.Pa nthawi yomweyi, mphamvu yochepetsera ya minofu ya ciliary imachepa.Mphamvu yolunjika ya diso idzachepanso, ndipo malo ogona adzachepa, ndipo presbyopia imapezeka panthawiyi.
Kodi magalasi opita patsogolo ndi chiyani?
Magalasi opitilira patsogolo (monga ma lens a Varilux) nthawi zambiri amapereka chitonthozo komanso magwiridwe antchito, koma palinso mitundu ina yambiri.Katswiri wanu wa chisamaliro cha maso akhoza kukambirana nanu za mawonekedwe ndi maubwino a magalasi omwe akupita patsogolo ndi kukuthandizani kupeza magalasi abwino kwambiri pazosowa zanu zenizeni.
kuwona zinthu momveka bwino pamtunda uliwonse.
Komano, ma bifocals ali ndi mphamvu ziwiri zokha za lens - imodzi yowonera zinthu zakutali bwino komanso mphamvu yachiwiri kumunsi.
theka la disolo kuti muwone bwino patali wowerengera.Kulumikizana pakati pa magawo amphamvu awa
amatanthauzidwa ndi "bifocal line" yowoneka yomwe imadutsa pakati pa disolo.
Mapindu a Lens Akupita patsogolo
Magalasi opita patsogolo, kumbali ina, ali ndi mphamvu zambiri za lens kuposa ma bifocals kapena trifocals, ndipo pali kusintha kwapang'onopang'ono kwamphamvu kuchokera kumalo kupita kumalo kudutsa pamwamba pa mandala.
Mapangidwe a multifocal a magalasi opita patsogolo amapereka maubwino awa:
* Imawonetsetsa bwino patali (m'malo mongoyang'ana mitu iwiri kapena itatu yokha).
* Imathetsa "kudumpha kwazithunzi" kovutitsa komwe kumachitika chifukwa cha ma bifocals ndi trifocals.Apa ndi pamene zinthu zimasintha mwadzidzidzi momveka bwino komanso powonekera pamene maso anu akuyenda kudutsa mizere yowonekera mu magalasi awa.
* Chifukwa palibe "mizere ya bifocal" yowoneka m'magalasi opita patsogolo, amakupatsirani mawonekedwe achichepere kuposa ma bifocal kapena trifocals.(Chifukwa chake chokha chingakhale chifukwa chake anthu ambiri masiku ano amavala magalasi opita patsogolo kuposa omwe amavala ma bifocal ndi trifocal pamodzi.)
Nthawi yotumiza: Oct-14-2022