Hapana kunetseka - izvo hazvireve kuti unofanirwa kupfeka zvisingafadzi bifocals kana trifocals. Kune vanhu vazhinji, mitsara-yemahara inofambira mberi lenzi isarudzo iri nani.
Chii chinonzi progressive lens?
Progressive lens hapana-mutsara multifocal eyeglass lenses anotaridzika chaizvo akafanana neamwechete ekuona lenzi. Mune mamwe mazwi, lenzi dzinofambira mberi dzinokubatsira kuona zvakajeka pamadaro ese pasina izvo zvinogumbura (uye zera-kutsanangura) "bifocal mitsara" inoonekwa mune yakajairwa bifocals uye trifocals.
Simba remalenzi anofambira mberi rinoshanduka zvishoma nezvishoma kubva pane imwe nzvimbo kuenda pane imwe nzvimbo yelens, ichipa iyo chaiyo lens simba rekuona zvinhu zvakajeka pane chero chinhambwe.
Bifocals, kune rumwe rutivi, inongova nemasimba maviri e-lens - imwe yekuona zvinhu zviri kure zvakajeka uye rechipiri simba muhafu yepasi yelens yekuona zvakajeka pane imwe nzvimbo yekuverenga. Kusangana pakati peaya akasiyana masimba masimba kunotsanangurwa neinooneka "bifocal line" inocheka nepakati pelenzi.
Malenzi anofambira mberi, dzimwe nguva anonzi "no-line bifocals" nekuti haana iyi inooneka bifocal line. Asi malenzi anofambira mberi ane dhizaini yepamberi yakawanda kupfuura bifocals kana trifocals.
Malensi ekutanga anofambira mberi, anowanzo kupa nyaradzo yakanakisa uye kuita, asi kune mamwe akawanda mabhureki uye mamwe mabasa zvakare, senge photochromic inofambira mberi lens, bluecut progressive lens zvichingodaro, uye zvakasiyana siyana. Iwe unogona kuzvitsvakira iwe pachako pane yedu pejihttps://www.universeoptical.com/progressive-lenses-product/.
Vanhu vazhinji vanotanga kuda magirazi emaziso akawanda pane imwe nguva mushure memakore 40. Apa ndipo apo kuchinja kwemazuva ose kukwegura muziso kunonzi presbyopia kunoderedza kukwanisa kwedu kuona zvakajeka pedyo. Kune chero munhu ane presbyopia, malenzi anofambira mberi ane akakosha ekuona uye ekushongedza mabhenefiti achienzaniswa neyechinyakare bifocals uye trifocals.
Iyo multifocal dhizaini yemalensi anofambira mberi inopa pazasi zvakakosha mabhenefiti:
Inopa chiono chakajeka pamadaro ese (panzvimbo pekungoita maviri kana matatu akasiyana ekuona madaro).
Inobvisa zvinonetsa "kusvetuka kwemufananidzo" kunokonzerwa ne bifocals uye trifocals. Apa ndipo apo zvinhu zvinongoerekana zvachinja mukujeka uye nzvimbo inooneka apo maziso ako anofamba achiyambuka mitsetse inooneka mumalenzi aya.
Nekuti hapana anooneka "bifocal mitsara" mumalenzi anofambira mberi, anokupa kutaridzika kwehudiki kupfuura bifocals kana trifocals. (Ichi chikonzero chega chingava chikonzero nei vanhu vakawanda nhasi vachipfeka lenzi dzinofambira mberi kupfuura nhamba inopfeka bifocal uye trifocals dzakasanganiswa.)