Bifocal
Lens ine minda miviri yekuona yakaparadzaniswa nemutsara.Kazhinji kumusoro kwakarongerwa kureba-kuona kana komputa-chinhambwe uye pasi kuitira basa rekuona-pedyo sekuverenga.
MuBifocal lenzi, iyo minda miviri yekuona inosiyaniswa neazvinoonekaline.Nzvimbo yepasi yekuverenga ndeye 28mm yakafara uye yakaiswa pazasi pepakati peiyo lens.Nzvimbo yemuviri yebi-focal nzvimbo ichakanganiswa nehurefu hwemuviri hwe lens yakasarudzwa.
Hurefu hwelenzi hweBifocal hunofanirwa kunge huri 30mm kana kupfuura.Isu tinokurudzira lens yakareba kuti iwedzere kugadzikana, asi 30 mm ndiyo hudiki hurefu hwebifocal lens.Kana furemu yakasarudzwa iine kureba kwelenzi idiki pane 30mm, furemu yakasiyana inofanira kusarudzwa yeBifocal lenzi.
Progressive
Izvi zvinoreva dhizaini yelens iyo inosanganisira akati wandei minda yekuona, isina mitsetse, uye dzimwe nguva inonzi "hapana-mutsara yakawanda-yakatarisana".Mune lenzi inofambira mberi, chimiro chechikamu chakagadziridzwa chelenzi chinenge chefunnel kana howa.
MuStandard Progressive, chikamu chepamusoro ndechekuona chinhambwe, chichienda nechepakati chepakati-chiono chepakati, chokupedzisira kusvika pachikamu chepasi chechiratidzo chekuverenga.Nzvimbo dzepakati nedzekuverengera dzinotarisirwa kuva diki pane nhambwe.Standard Progressives ndiwo anowanzo kupfekwa malenzi anofambira mberi.
Munzvimbo Yekushanda Inofambira mberi, chikamu chepamusoro ndechekuona kwepakati, nepo chikamu chepasi chiri chepedyo-kuona kana kuverenga;hapana chiono chinhambwe muWorkspace Progressive.Kune mhando mbiri dzeWorkspace Progressives: iyo Mid-Range Progressive, uye iyo Near-Range Inofambira mberi.Iyo Mid-Range Progressive inokodzera basa repedyo rinosanganisira kuona kunorema kwepakati senge makomputa edesktop nemisangano, nepo Near-Range Progressive yakanakira kumira padyo nebasa sekuverenga kwenguva refu, kushandiswa kwechigadzirwa chinobatwa nemaoko, nekugadzira.
Kureba kwelenzi kune inofambira mberi kunofanirwa kuve 30mm kana kupfuura.Isu tinokurudzira lens yakareba kuti iwedzere kugadzikana kupfeka, asi iyo shoma lens kureba ndeye 30 mm.Kana furemu iyi iine kureba kwelenzi idiki pane 30mm, furemu yakasiyana inofanira kusarudzwa yemalenzi anofambira mberi.
Nguva yekutumira: Zvita-10-2020