Mchitidwe wa presbyopia pang'onopang'ono kuonekera pambuyo zaka 40, koma m'zaka zaposachedwapa, chifukwa cha makhalidwe osauka maso a anthu amakono, anthu ochulukirachulukira ndi presbyopia lipoti pasadakhale.Chifukwa chake, kufunikira kwabifocalsndiopita patsogolochawonjezekanso.Ndi magalasi ati mwa awiriwa omwe amakonda kwambiri anthu omwe ali ndi myopia ndi presbyopia?
1. Bifocals
Bifocals ali ndi madigiri awiri.Nthawi zambiri, kumtunda kumagwiritsidwa ntchito kuona malo akutali, monga kuyendetsa galimoto ndi kuyenda;mbali ya m'munsi imagwiritsidwa ntchito kuona pafupi, monga kuwerenga buku, kusewera ndi foni yam'manja, ndi zina zotero. Pamene magalasi a bifocal adatuluka koyamba, iwo amaonedwa kuti ndi uthenga wabwino kwa anthu omwe ali ndifupikitsa komanso presbyopia, kuthetsa vuto la kuchotsa kawirikawiri ndi kuvala, koma monga momwe anthu amagwiritsira ntchito, adapeza kuti magalasi a bifocal alinso ndi zovuta zambiri.
Choyamba, vuto lalikulu la magalasi amtunduwu ndikuti pali madigiri awiri okha, ndipo palibe kusintha kosalala pakati pa kuyang'ana kutali ndi pafupi, kotero n'zosavuta kupanga prism phenomenon, yomwe nthawi zambiri imatchedwa "kudumpha fano".Ndipo ndizosavuta kugwa mukavala, zomwe sizikhala zotetezeka kwa ovala, makamaka okalamba.
Kachiwiri, vuto lina lodziwikiratu la magalasi a bifocal ndikuti ngati muyang'ana mosamala magalasi a bifocal, mutha kuwona mzere wolekanitsa bwino pakati pa madigiri awiri pa mandala.Kotero ponena za kukongola, sizingakhale zokongola kwambiri.Pankhani yachinsinsi, chifukwa cha mawonekedwe owoneka bwino a magalasi a bifocal, zitha kukhala zovuta kwa ovala achichepere.
Magalasi a Bifocal amachotsa vuto la kuchotsa pafupipafupi komanso kuvala myopia ndi presbyopia.Amatha kuona bwino patali komanso pafupi, ndipo mtengo wake ndi wotsika mtengo;koma mtunda wapakati ukhoza kukhala wosawoneka bwino, ndipo chitetezo ndi kukongola sizowoneka bwino.
2. Opita patsogolo
Magalasi opita patsogolo amakhala ndi malo angapo, kotero ngati magalasi a bifocal, ndi oyenera anthu omwe ali ndi vuto losawona bwino komanso presbyopia.Mbali ya pamwamba ya mandala imagwiritsidwa ntchito kuona mtunda, ndipo yapansi ndiyo kuona pafupi.Koma mosiyana ndi magalasi a bifocal, pali zone yosinthira ("progressive zone") pakati pa lens yopita patsogolo, yomwe imatilola kuti tiziwona mtunda kuchokera kutali kupita kufupi.Kuphatikiza pa pamwamba, pakati, ndi pansi, palinso malo akhungu kumbali zonse ziwiri za lens.Derali silingathe kuwona zinthu, koma ndi laling'ono, kotero silimakhudza kugwiritsa ntchito.
Ponena za maonekedwe, magalasi opita patsogolo kwenikweni ndi osadziwika bwino ndi magalasi a masomphenya amodzi, ndipo mzere wogawanika sudzawoneka mosavuta, chifukwa yekhayo amene amavala magalasi opita patsogolo amatha kumva kusiyana kwa mphamvu m'madera osiyanasiyana.Ndizoyenera kwambiri kwa iwo omwe akufuna kuteteza zinsinsi zawo.Ponena za magwiridwe antchito, imatha kukwaniritsa zosowa zowonera kutali, pakati ndi pafupi.Ndikosavuta kuyang'ana mtunda wapakati, pali malo osinthira, ndipo masomphenyawo azikhala omveka bwino, kotero potengera momwe amagwiritsidwira ntchito, zopita patsogolo zimakhalanso zabwino kuposa ma bifocals.
Nthawi yotumiza: Jun-30-2023