kusiyana pakati pa varifocals ndi bifocals ndi chiyani

Varifocals ndi bifocals ndi mitundu yonse ya magalasi agalasi opangidwa kuti athetse vuto la masomphenya okhudzana ndi presbyopia, chikhalidwe chokhudzana ndi ukalamba chomwe chimakhudza pafupi ndi masomphenya.Ngakhale mitundu yonse iwiri ya magalasi imathandizira anthu kuwona patali, amasiyana pamapangidwe ndi magwiridwe antchito.Mu kufananitsa kwakukuluku, tiwona kusiyana kwakukulu pakati pa ma varifocals ndi bifocals, kuphatikizapo zomangamanga, ubwino, zovuta, ndi kulingalira posankha chimodzi pa chimzake.

Bifocals: Bifocals adapangidwa ndi Benjamin Franklin kumapeto kwa zaka za zana la 18 ndipo ali ndi magawo awiri osiyana a lens.Gawo lapamwamba la lens limagwiritsidwa ntchito poyang'ana patali, pamene gawo lapansi limapangidwira masomphenya apafupi.

Zomangamanga:Magalasi a Bifocal amadziwika ndi mzere wowoneka wopingasa womwe umalekanitsa magawo awiri a lens.Mzerewu umatchedwa "bifocal line," ndipo umapereka chizindikiro chowonekera bwino cha kusintha kwa mtunda ndi pafupi ndi masomphenya a lens.

Ubwino Wowonera:Ubwino waukulu wa magalasi a bifocal ndikusiyanitsa bwino pakati pa mtunda ndi pafupi ndi maso.Kusintha kwadzidzidzi pa mzere wa bifocal kumalola ovalawo kusinthana mosavuta pakati pa mtunda wapakatikati mwa kuyang'ana gawo loyenera la lens.

Zovuta:Chimodzi mwazovuta zazikulu za bifocals ndi mzere wowoneka, womwe ungakhale wosasangalatsa kwa anthu ena.Kuonjezera apo, kusintha kwadzidzidzi pakati pa magawo awiri a lens kungayambitse kusokonezeka kwa maso kapena kusokoneza, makamaka pakusintha mofulumira kuyang'ana pakati pa mtunda ndi pafupi ndi zinthu.

Zoganizira:Poganizira za bifocal, anthu ayenera kudziwa zosowa zawo komanso zomwe amakonda.Bifocals ndi njira yoyenera kwa iwo omwe ali ndi zofunikira zosiyana komanso zodziwikiratu patali komanso pafupi ndi kukonza masomphenya.

Zosiyanasiyana:Ma Varifocals, omwe amadziwikanso kuti ma lens opita patsogolo, amapereka kusintha kosasunthika pakati pa mtunda wautali wokhazikika popanda mzere wowoneka wopezeka mu bifocals.Ma lens awa amapereka kuwongolera kwa mtunda, wapakati, ndi masomphenya apafupi mkati mwa kapangidwe ka lens kamodzi.

Zomangamanga:Magalasi a Varifocal amakhala ndi kupitilira kwapang'onopang'ono kwa mphamvu ya mandala kuchokera pamwamba mpaka pansi, zomwe zimalola ovala kuti asunthire kuyang'ana kwawo pakati pa mtunda wosiyanasiyana popanda mzere wowonekera.Mosiyana ndi ma bifocals, ma lens a varifocal alibe gawo lowoneka, lomwe limapereka mawonekedwe achilengedwe komanso owoneka bwino.

Ubwino Wowonera:Ubwino waukulu wa varifocals ndi kuthekera kwawo kupereka mosalekeza, kuwongolera masomphenya achilengedwe pamtunda wosiyanasiyana.Mapangidwe awa amalola ovala kuti azitha kusintha pakati pakutali, apakatikati, ndi pafupi ndi masomphenya osawona kusintha kwadzidzidzi komwe kumakhudzana ndi magalasi a bifocal.

Zovuta:Ngakhale ma varifocals amapereka chidziwitso chowoneka bwino, ena ovala angafunike nthawi kuti agwirizane ndi momwe magalasi akupitira patsogolo.Nthawi yosinthira iyi, yomwe nthawi zambiri imatchedwa "kusintha," imatha kuphatikizira kuzolowera magawo osiyanasiyana amasomphenya mkati mwa mandala ndikuphunzira kugwiritsa ntchito bwino mandala pazinthu zosiyanasiyana.

Zoganizira:Poganizira za varifocal, anthu ayenera kuganizira za moyo wawo komanso mawonekedwe awo.Magalasi a Varifocal ndi abwino kwa iwo omwe amafunikira kuwongolera masomphenya mosasunthika pamtunda wautali ndipo amalakalaka kupanga magalasi mochenjera komanso mokongola.

Kusankha Pakati pa Varifocals ndi Bifocals: Posankha pakati pa varifocals ndi bifocals, zinthu zingapo ziyenera kuganiziridwa kuti zitsimikizire njira yoyenera kwambiri pazokonda za munthu payekha komanso zosowa zowoneka.

Moyo ndi Zochita:Ganizirani zochitika zenizeni ndi ntchito zomwe zimafuna masomphenya omveka bwino pamtunda wosiyana.Mwachitsanzo, anthu omwe ntchito yawo imakhudza kusintha kwafupipafupi pakati pa kuona pafupi ndi kutali akhoza kupindula ndi kusintha kosasunthika komwe kumaperekedwa ndi varifocals.Kumbali ina, iwo omwe ali ndi zofunikira zodziwikiratu za masomphenya atha kupeza ma bifocal kukhala chisankho chothandiza.

Zokonda Zokongoletsa:Anthu ena amakonda kwambiri maonekedwe a magalasi awo.Ma Varifocals, omwe alibe mzere wowoneka bwino, nthawi zambiri amapereka njira yosangalatsa kwambiri kwa ovala omwe amaika patsogolo mawonekedwe osasunthika, amakono.Bifocals, ndi mzere wawo wosiyana wa bifocal, akhoza kukhala osasangalatsa kwambiri kuchokera ku zokongoletsa.

Kutonthoza ndi Kusintha:Kuganiziridwa kuyenera kuganiziridwa pa nthawi yosinthika yofunikira kwa ma varifocals ndi bifocals.Ngakhale ma varifocal amapereka kusintha kwachilengedwe pakati pa mtunda wokhazikika, ovala angafunike nthawi kuti agwirizane ndi kapangidwe ka magalasi opita patsogolo.Ovala ma bifocal amatha kusintha mwachangu chifukwa cha kusiyana koonekeratu pakati pa mtunda ndi pafupi ndi gawo la masomphenya.

Zofunikira Zolemba ndi Zowona:Anthu omwe ali ndi malangizo ovuta a masomphenya kapena zovuta zowonera atha kupeza kuti mtundu umodzi wa lens umakwaniritsa zosowa zawo.Ndikofunika kukaonana ndi katswiri wa chisamaliro cha maso kuti mudziwe njira yoyenera kwambiri ya lens malinga ndi zofunikira za masomphenya.

Pomaliza, ma varifocals ndi ma bifocals amasiyana pakumanga, zopindulitsa za kuwala, zopinga, komanso zolingalira za ovala.Ngakhale ma bifocals amapereka kusiyanitsa koonekeratu pakati pa mtunda ndi pafupi ndi masomphenya ndi mzere wowonekera, ma varifocals amapereka kusintha kosasunthika pakati pa mtunda wautali wokhazikika popanda gawo lowonekera.Posankha pakati pa varifocals ndi bifocals, moyo, zokonda zokongola, chitonthozo, kusintha, ndi masomphenya a munthu aliyense ayenera kuganizira.Pomvetsetsa mawonekedwe apadera ndi malingaliro okhudzana ndi mtundu uliwonse wa lens, anthu amatha kupanga chisankho chodziwitsidwa kuti akwaniritse zofunikira za masomphenya awo.