Koma kupitilira kukhala magalasi owoneka bwino opanda mizere yowonekera, magalasi opita patsogolo amathandizira anthu omwe ali ndi presbyopia kuwonanso bwino patali.
Ubwino wa magalasi opita patsogolo kuposa ma bifocals
Magalasi agalasi a Bifocal ali ndi mphamvu ziwiri zokha: imodzi yowonera chipinda chonsecho ndipo inayo yowonera pafupi. Zinthu zapakati, monga zowonera pakompyuta kapena zinthu zapashelufu ya golosale, nthawi zambiri zimakhala zosawoneka bwino ndi ma bifocals.
Kuti ayese kuwona zinthu zomwe zili "pakati" izi momveka bwino, ovala ma bifocal ayenera kuwerama mitu yawo mmwamba ndi pansi, mosinthana kuyang'ana kumtunda kenako pansi pa ma bifocals awo, kuti adziwe kuti ndi gawo liti la lens lomwe limagwira ntchito bwino.
Magalasi opita patsogolo amatsanzira kwambiri masomphenya achilengedwe omwe mudasangalala nawo isanayambike presbyopia. M'malo mongopereka mphamvu ziwiri zokha za lens monga ma bifocals (kapena atatu, ngati ma trifocals), magalasi opita patsogolo ndi ma lens enieni a "multifocal" omwe amapereka kupititsa patsogolo kosalala, kosasunthika kwa mphamvu zambiri zama lens kuti muwone bwino chipinda chonsecho, pafupi ndi mtunda uliwonse. pakati.
Masomphenya achilengedwe popanda "kudumpha kwazithunzi"
Mizere yowoneka mu bifocals ndi trifocals ndi malo omwe pali mwadzidzidzi. Komanso, chifukwa cha kuchuluka kwa mphamvu zama lens mu ma bifocal ndi ma trifocals, kuya kwa chidwi chanu ndi magalasi awa ndikochepa. Kuti zinthu ziwoneke bwino, ziyenera kukhala pamtunda wosiyanasiyana. Zinthu zomwe zili kunja kwa mtunda wophimbidwa ndi ma lens a bifocal kapena trifocal lens zitha kuzimiririka ndikusintha mphamvu ya mandala.
Komano, magalasi opita patsogolo amakhala ndi mphamvu zowoneka bwino komanso zowoneka bwino patali. Magalasi opita patsogolo amapereka kuzama kwachilengedwe kopanda "kudumpha kwazithunzi."
Mphamvu ya magalasi opita patsogolo imasintha pang'onopang'ono kuchokera ku mfundo kupita kumalo a lens pamwamba, kupereka mphamvu yolondola ya lens yowona zinthu momveka bwino pamtunda uliwonse.
Imawonetsetsa bwino pamipata yonse (osati pamipata iwiri kapena itatu yosiyana yowonera).
Kuti muwone bwino, chitonthozo ndi mawonekedwe, mutha kusankha makonde okulirapo kuti muzitha kusintha mwachangu komanso mwachangu kuposa magalasi opita patsogolo. Mutha kulowa patsambahttps://www.universeoptical.com/wideview-product/kuti muwone zambiri zamapangidwe athu aposachedwa kwambiri.