Pali magulu anayi akuluakulu owongolera masomphenya - emmetropia, myopia, hyperopia, ndi astigmatism.
Emmetropia ndi masomphenya abwino. Diso layamba kale kunyezimira bwino pa retina ndipo silifuna kukonza magalasi.
Myopia imadziwika kwambiri kuti pafupi ndi maso. Zimachitika pamene diso lili lalitali pang'ono, zomwe zimapangitsa kuwala kumayang'ana kutsogolo kwa retina.
Kuti muwongolere myopia, dokotala wamaso amakulemberani ma lens (-X.XX). Ma lens ochotsera awa amakankhira nsonga yolunjika kumbuyo kuti igwirizane bwino ndi retina.
Myopia ndi njira yofala kwambiri ya zolakwika za refraction masiku ano. M’chenicheni, amalingaliridwadi kukhala mliri wapadziko lonse, popeza kuti anthu owonjezerekawonjezereka akuzindikiridwa ndi vutoli chaka ndi chaka.
Anthu awa amatha kuwona bwino pafupi, koma zinthu zakutali zimawoneka zosamveka.
Kwa ana, mungaone kuti mwanayo akuvutika kwambiri powerenga bolodi kusukulu, atagwira zinthu zowerengera (mafoni a m'manja, mabuku, ma iPads, ndi zina zotero) ali pafupi kwambiri ndi nkhope zawo, atakhala pafupi kwambiri ndi TV chifukwa "sangathe. onani”, kapena ngakhale kusisita kapena kusisita maso kwambiri.
Komano, hyperopia imachitika pamene munthu amatha kuona kutali, koma zimakhala zovuta kuti aziwona zinthu pafupi.
Ena mwa madandaulo omwe amapezeka kwambiri ndi hyperopes sikuti satha kuwona, koma m'malo mwake amamva mutu akawerenga kapena kugwira ntchito pakompyuta, kapena kuti maso awo nthawi zambiri amatopa kapena kutopa.
Hyperopia imachitika pamene diso lili lalifupi kwambiri. Chifukwa chake, kuwala kumayang'ana pang'ono kumbuyo kwa retina.
Ndi masomphenya abwinobwino, chithunzi chimayang'ana kwambiri pamwamba pa retina. Poyang'ana patali (hyperopia), cornea yanu siimaunikira bwino, kotero kuti mfundoyi imagwera kumbuyo kwa retina. Izi zimapangitsa kuti zinthu zapafupi ziziwoneka zosamveka.
Kuti akonze hyperopia, madokotala amalembera magalasi owonjezera (+X.XX) kuti abweretse nsonga yakutsogolo kuti ifike pa retina.
Astigmatism ndi nkhani ina yonse. Astigmatism imachitika pamene kutsogolo kwa diso (cornea) sikuli kozungulira.
Ganizirani za cornea wamba yowoneka ngati basketball yodulidwa pakati. Ndilozungulira bwino komanso lofanana mbali zonse.
Mphuno ya astigmatic imawoneka ngati dzira lophika lodulidwa pakati. Meridian imodzi ndi yayitali kuposa inzake.
Kukhala ndi ma meridians owoneka mosiyanasiyana a diso kumabweretsa mfundo ziwiri zosiyana. Chifukwa chake, lens ya magalasi iyenera kupangidwa kuti ikonzere ma meridians onse. Dongosololi likhala ndi manambala awiri. Mwachitsanzo-1.00 -0.50 X 180.
Nambala yoyamba imasonyeza mphamvu yofunikira kuwongolera meridian imodzi pamene nambala yachiwiri imasonyeza mphamvu yofunikira kukonza meridian ina. Nambala yachitatu (X 180) imangonena pomwe ma meridians awiri amagona (amatha kuyambira 0 mpaka 180).
Maso ali ngati zidindo za zala—palibe ziwiri zofanana ndendende. Tikufuna kuti muwone bwino kwambiri, chifukwa chake, popanga ma lens osiyanasiyana, titha kugwirira ntchito limodzi kuti tipeze yankho labwino kwambiri lokwaniritsa zosowa zanu.
Chilengedwe chikhoza kupereka magalasi abwinoko kuti athetse mavuto omwe ali pamwambawa. Pls imayang'ana kwambiri zinthu zathu:www.universeoptical.com/products/