Usazvidya moyo — izvozvo hazvirevi kuti unofanira kupfeka bifocals kana trifocals zvisina kunaka. Kune vanhu vazhinji, malenzi eprogressive asina line isarudzo iri nani.
Chii chinonzi malenzi anofambira mberi?
Magirazi eProgressive magirazi emaziso asina mitsetse yakawanda anotaridzika zvakafanana nemagirazi ekuona kamwe chete. Nemamwe mashoko, magirazi eProgressive achakubatsira kuona zvakajeka padaro rese pasina "mitsetse yebifocal" inonetsa (uye inotsanangura zera) inoonekwa mu "bifocal" ne "trifocal" dzakajairwa.
Simba rema lenzi anofambira mberi rinochinja zvishoma nezvishoma kubva panzvimbo imwe kuenda pane imwe pamusoro pe lenzi, zvichipa simba rakakodzera re lenzi rekuona zvinhu zvakajeka padyo nechero daro.
Kune rumwe rutivi, maBifocal ane masimba maviri chete elenzi — rimwe rekuona zvinhu zviri kure zvakajeka uye rimwe rechipiri riri muhafu yepasi yelenzi rekuona zvakajeka padanho rakatarwa rekuverenga. Kubatana pakati penzvimbo idzi dzesimba dzakasiyana kunotsanangurwa ne "mutsara webifocal" unooneka unocheka pakati pelenzi.
Magirazi eProgressive, dzimwe nguva anonzi "no-line bifocals" nekuti haana mutsetse uyu unooneka webifocal. Asi magirazi eProgressive ane dhizaini yepamusoro-soro yemultifocal kupfuura mabhifocals kana matrifocals.
Malenzi epamusoro-soro anowanzo kupa nyaradzo yakanakisa uye mashandiro akanaka, asi kune mamwe marudzi akawanda uye mamwe mabasa zvakare, senge lenzi ye photochromic progressive, lenzi ye bluecut progressive nezvimwewo, uye zvinhu zvakasiyana-siyana. Unogona kuwana yakakunakira papeji redu.https://www.universeoptical.com/progressive-lenses-product/.
Vanhu vazhinji vanotanga kuda magirazi emaziso ane magirazi akawanda mushure memakore makumi mana. Apa ndipo apo shanduko yenguva dzose yekukwegura muziso inonzi presbyopia inoderedza kugona kwedu kuona zviri pedyo. Kune chero munhu ane presbyopia, magirazi eprogressive ane mabhenefiti makuru ekuona uye ekushongedza zvichienzaniswa ne bifocals ne trifocals dzechinyakare.
Kugadzirwa kwema lenses eprogressive lenses akawanda kunopa mabhenefiti akakosha anotevera:
Inopa kuona kwakajeka padaro rese (panzvimbo pekungoona daro remadaro maviri kana matatu akasiyana).
Inobvisa "kusvetuka kwemufananidzo" kunokonzerwa ne "bifocals" ne "trifocals". Apa ndipo panobva zvinhu zvinoshanduka kamwe kamwe mukujeka uye nzvimbo inooneka kana maziso ako achifamba pamitsetse inoonekwa mumalenzi aya.
Nekuti hapana "mitsetse yebifocal" inoonekwa mumalenzi eprogressive, inoita kuti utaridzike sewechidiki kupfuura malenzi ebifocal kana matrifocal. (Chikonzero ichi chega chingave chikonzero nei vanhu vakawanda nhasi vachipfeka malenzi eprogressive kupfuura nhamba yevanhu vanopfeka malenzi ebifocal netrifocal zvakabatana.)