Magalasi mwapang'onopang'ono

Anthu ambiri patapita zaka makumi anai ndi mavuto ndi moganizira maganizo ake anapanga pa mtunda pafupi. Matenda amatchedwa presbyopia. Komanso ndife bwino ngati patali zokha zakubadwa. Odwala hyperopia, mpaka nthawi vuto si amachita chithandizo cha magalasi, ndi kugula kuphatikiza-mandala. Myopic, akudwala myopia, kuziganizira masomphenya pa mtunda waufupi mu mfundo opanda.

Presbyopia amakhala ndi luso la kupitirira nthawi zonse ndipo umalandira pazipita mawonetseredwe ake zaka makumi asanu ndi limodzi kapena asanu ndi limodzi mphambu zisanu. Mtunda pa zimene chinthu chikuoneka bwino, pang'onopang'ono kumawonjezera. Posacedwapa Pakufunika ogulidwa ndi awiri owonjezera a magalasi. Iwo ayenera kuona pa mtunda owonjezera masentimita makumi mpaka fifite. Odwala ena kupeza magulu atatu kapena anayi a magalasi, amene ntchito mu zinthu zosiyanasiyana. Ena - kuŵerenga, winayo - pa kompyuta, ndi ena - poyendetsa, ndi zina zotero.

magalasi Progressive ndi chida atsopano cholinga kukonza presbyopia. cholinga chawo chachikulu ndi kuthekera kwa masomphenya a zinthu pa mtunda osiyana. magalasi Progressive ndi multifocal mu iwo. Iwo anawagawa m'magulu angapo.

magalasi Progressive m'dera ake chapamwamba cholinga yambaona zinthu zimene ali kutali maso. Kupezeka kwa gawo lino walola kuti tiziganizira, pokhalabe ndi malo achilengedwe mutu. The mmunsi mwa mandala lakonzedwa masomphenya pa mtunda pafupi. Ntchito, kuyang'ana adatchithisira pansi. Pakati zone chapamwamba ndipo m'munsi pali kusiyana mphamvu dioptric, kutchedwa pokha mphamvu. Nthawi zambiri si upambana diopters awiri kapena atatu. Pakati mabacteria ili kupitirira kulowera. mphamvu yake kuwala amasintha bwino, wakupatsani kupereka bwinobwino zinthu pa mtunda sing'anga. magalasi Progressive m'mbali mwa munda sizili kaamba pamaso chifukwa kupotoza kwambiri kuwala.

magalasi zamakono zili ndi ubwino wake, ngakhale ali zina zovuta. magalasi Progressive, amene ndemanga amati n'zotheka masomphenya wabwino wa zinthu pa mtunda osiyana, kulola chimodzi chokha magalasi. Kuwerenga, ntchito pa polojekiti computer, kupita zisudzo ndi ntchito makina. magalasi Progressive musataye kulumpha lakuthwa mu chithunzi pa nthawi imene maganizo amachoka zinthu lakutali pafupi, chifukwa cha kupitilira kulowera.

Zambiri za opanga amapereka magalasi makono yopangidwa ndi zisulo zosiyanasiyana ndipo amagulitsidwa magulu osiyana mtengo. Mwachitsanzo, magalasi mwapang'onopang'ono angathe kupanga kuchokera galasi ndi pulasitiki. Iwo akhoza kukhala photochromic ndipo ndi aspheric kamangidwe.

The drawback kwambiri magalasi mwapang'onopang'ono ndemanga wosuta, tinganene kuti ndi malo ochepa kukula chosungikira kwa kuganizira zinthu pa mtunda sing'anga, komanso gawo la kupotoza zotumphukira.