Paunopinda muchitoro chemagirazi uye woedza kutenga peya yemagirazi, une marudzi akati wandei emalenzi esarudzo zvichienderana nezvawakanyorera. Asi vanhu vazhinji vanovhiringika nemashoko ekuti one vision, bifocal and progressive. Aya mazwi anoreva magadzirirwo emalenzi mumagirazi ako. Asi kana usina chokwadi chekuti rudzii rwegirazi runodikanwa nemishonga yako, heino mhedziso yekukurumidza kukubatsira kuti utange.
1. Chii chinonzi Single Vision Lenses?
Lenzi yekuona imwe chete ndeye lenzi inobata gwaro rimwe chete. Iri rudzi rwelenzi rinoshandiswa kune zvirevo zvevanhu vanoona zviri pedyo, vanoona kure, vane astigmatism, kana vane musanganiswa wekukanganisa kwekuona. Muzviitiko zvakawanda, magirazi echiratidzo chimwe chete anoshandiswa nevanhu vanoda huwandu hwesimba rekuona kure uye kuvhara. Zvisinei, kune magirazi echiratidzo chimwe chete akagadzirirwa chinangwa chaicho. Semuenzaniso, magirazi ekuverenga anoshandiswa chete pakuverenga ane lenzi imwe yekuona.
Iyo single vision lens yakanakira vana vazhinji uye vadiki vakuru nekuti ivo kazhinji havadi kugadzirisa yavo yekuona kururamisa zvichienderana nekureba kwavo. Chiratidzo chako chegirazi chechiratidzo chinogara chinosanganisira spherical component senhamba yekutanga pane zvaunonyorera uye inogonawo kusanganisira cylinder component kugadzirisa astigmatism.
2. Chii chinonzi Bifocal Lenses?
Bifocal lenzi dzine nzvimbo mbiri dzakasiyana dzekugadzirisa maonero. Nzvimbo idzi dzakakamurwa nemutsara wakasiyana unogara wakachinjika mhiri kwelenzi. Chikamu chepamusoro chelenzi chinoshandiswa kureba, nepo chikamu chepasi chinoshandiswa pakuona pedyo. Chikamu chelenzi chakatsaurirwa kukuona kwepedyo chinogona kuumbwa nenzira mbiri dzakasiyana: D segment, denderedzwa segment (inoonekwa/isingaoneki), curve segment uye E-line.
Bifocal lenses anowanzo shandiswa kana mumwe munhu ari munhu asingawanzo jairana nemalenzi anofambira mberi kana muvana vadiki vane maziso anoyambuka pavanoverenga. Chikonzero chiri kuita kuti vasanyanya kushandiswa ndechekuti pane dambudziko rinowanzoitika rinokonzerwa ne-bifocal lenses inonzi "image jump", iyo mifananidzo inoita seinosvetuka apo maziso ako anofamba pakati pezvikamu zviviri zvelens.
3. Chii chinonzi Progressive Lens?
Dhizaini yemalenzi anofambira mberi ndeye nyowani uye yakanyanya kukwirisa kupfuura bifocals. Aya malenzi anopa inofambira mberi gradient yesimba kubva kumusoro kwelenzi kusvika pasi, ichipa shanduko isina musono kune akasiyana maonero ezvinodiwa. Progressive eyeglass lenses anonziwo no-line bifocal nekuti haana mutsara unooneka pakati pezvikamu, izvo zvinoita kuti awedzere kufadza.
Uyezve, magirazi emaziso anofambira mberi anogadzirawo shanduko yakatsetseka pakati pechinhambwe, chepakati, uye padyo nezvikamu zvezvakanyorerwa. Chikamu chepakati chelenzi chakanakira zviitiko zvepakati senge basa rekombuta. Magirazi emeso anofambira mberi ane sarudzo yekureba kana pfupi corridor dhizaini. Iyo corridor ndiyo chikamu chelenzi chinokupa iwe kugona kuona nhambwe dzepakati.
Mushoko, chiratidzo chimwe chete (SV), bifocal, uye lenzi inofambira mberi imwe neimwe inopa akasiyana ekugadzirisa maonero mhinduro. Malenzi ekuona ega ega echinhambwe chimwe chete (pedyo kana kure), nepo bifocal uye inofambira mberi lenzi inogadzirisa zvese zviri pedyo uye kure kuona mune imwe lenzi. Bifocals ine mutsara unooneka unoparadzanisa nzvimbo dziri pedyo nedzechinhambwe, nepo malenzi anofambira mberi achipa shanduko isina musono, yapedza kudzidza pakati pemadaro pasina mutsara unooneka. Kana uchida rumwe ruzivo, ndapota inzwa wakasununguka kutibata nesu.