Magalasi a Single Vision VS.Bifocal VS.Zopita patsogolo
magalasi a masomphenya amodzi amapereka kuwongolera kumodzi kokha.Izi zikutanthawuza kuti amagawanitsa mofanana pa lens lonse, m'malo mogawanitsa pakati pa theka lapamwamba ndi pansi, monga momwe zimakhalira ndi ma bifocals.Magalasi osawona amodzi ndiwo mtundu wodziwika bwino wamankhwala, ndipo amatha kukonza kusayang'ana pafupi (myopia) kapena kuwona patali (hyperopia).Ngati dokotala sanatchule mankhwala apadera kwambiri, mwayi ndi wakuti mudzafunika magalasi a masomphenya amodzi.Pali zifukwa zambiri zomwe mungafunikire masomphenya amodzi.Ogula ena amagwiritsa ntchito magalasi a masomphenya amodzi m'magalasi awo owerengera, zomwe zimapangitsa chithunzithunzi chowoneka bwino komanso chowoneka bwino.Ena amapindula ndi kumveka bwino kwambiri patali, mwachitsanzo, pogwiritsa ntchito magalasi omwe amawalembera masomphenya pamene akuyendetsa galimoto.
Bifocals amathandiza omwe amafunikira kuwongolera masomphenya a myopia (kuona mwachidule) ndi presbyopia (kupenya kwakutali).Magalasi amalola kuwona bwino mtunda uliwonse mkati mwa magalasi amodzi.
Atha kuganiziridwa ngati magalasi wamba omwe ali ndi gawo lowonjezera lowerengera.Gawo lowerengera nthawi zambiri limayikidwa kumunsi kwa lens
D Seg Bifocals
Malo owerengera a D Seg Bifocal amawoneka ngati chilembo D chomwe chili pambali pake.Atha kutchulidwa kuti Flat Top Bifocal.D Seg ndiye kapangidwe kosavuta ka Bifocal kwa wovala kuti azolowere.Chifukwa cha ichi, ndi mtundu wotchuka kwambiri pa msika lero.
Gawo lowerengera likupezeka m'mitundu yosiyanasiyana.Magalasi omwe amagwiritsidwa ntchito kwambiri ndi D 28 ndi D 35. Gawo la D 28 ndi 28mm m'lifupi ndi D 35 ndi 35mm m'lifupi.
D Seg Bifocals
Malo owerengera a D Seg Bifocal amawoneka ngati chilembo D chomwe chili pambali pake.Atha kutchulidwa kuti Flat Top Bifocal.D Seg ndiye kapangidwe kosavuta ka Bifocal kwa wovala kuti azolowere.Chifukwa cha ichi, ndi mtundu wotchuka kwambiri pa msika lero.
Gawo lowerengera likupezeka m'mitundu yosiyanasiyana.Magalasi omwe amagwiritsidwa ntchito kwambiri ndi D 28 ndi D 35. Gawo la D 28 ndi 28mm m'lifupi ndi D 35 ndi 35mm m'lifupi.
Ma bifocals osakanikirana
Ngakhale ma bifocals ambiri ali ndi mizere yowonekera pamalire a magawo a mandala, pali gawo lozungulira lozungulira lomwe lili ndi gawo lowoneka bwino lapafupi kuposa msuweni wake wanthawi zonse.
Gawo lapafupi limaphatikizidwa mu gawo lakutali la lens kotero kuti silikuwoneka.
Popanda mizere yowonekera, seg bifocal yozungulira yozungulira imapereka mawonekedwe achichepere kuposa ma bifocal okhala ndi mizere.
Magalasi opita patsogolo ali ndi malangizo atatu mu magalasi amodzi.Izi zimakuthandizani kuti muzichita ntchito zapafupi (monga kuwerenga buku), ntchito yapakatikati (monga kuyang'ana tsamba lawebusayiti pakompyuta), kapena kuyang'ana patali (monga kuyendetsa galimoto) osafunikira kusintha magalasi anu.Nthawi zina amatchedwa multifocal lens.
Ma lens opita patsogolo ndikusintha kwa magalasi a bifocal ndi trifocal.Magalasi amitundu iwiri yamtunduwu amakhala ndi mizere yodziwika bwino m'magalasi.Progressives ali ndi mawonekedwe osasinthika.Nthawi zina amatchedwa "no-line bifocals," koma sizolondola.Zingakhale zolondola kwambiri kutchula ma lens opita patsogolo "no-line trifocals."
Ndi magalasi opita patsogolo, simudzafunika kukhala ndi magalasi oposa limodzi.Simufunikanso kusinthana pakati pa kuwerenga kwanu ndi magalasi okhazikika.
Masomphenya ndi opita patsogolo amatha kuwoneka mwachilengedwe.Ngati mutasiya kuyang'ana chinachake pafupi ndi chinachake chakutali, simungadumphe monga momwe mungachitire ndi bifocals kapena trifocals.Choncho ngati mukuyendetsa galimoto, mukhoza kuyang’ana pa dashibodi yanu, pamsewu, kapenanso chikwangwani chomwe chili chapatali chomwe chimayenda bwino.
Nthawi yotumiza: Apr-08-2022