Njengoba sikhula, ilensi, uhlelo lokugxila lwamehlo ethu, iqala ukuqina kancane kancane futhi ilahlekelwe ukunwebeka kwayo, futhi amandla ayo okulungisa aqala ukuncipha kancane kancane, okuholela esimweni esivamile somzimba: i-presbyopia. Uma indawo eseduze ingaphezu kwamasentimitha angu-30, futhi izinto zingabonakali kahle ngaphakathi kwamasentimitha angu-30, futhi udinga ukusondeza kude ukuze ubone kahle, kufanele ucabangele ukugqoka izibuko ze-presbyopic.
Kulokhu sifunda ngezibuko ze-progressive multifocal kuma-presbyopia optics. Uma kwenzeka i-presbyopia, kuyakhathaza kakhulu ukubona, ngoba iso lomuntu liba sesimweni sokuphumula uma ubheka kude, futhi kudingeka ukugxila okukhulu uma ubheka eduze. Kodwa-ke, amandla okulungisa elensi ye-presbyopic abuthakathaka, futhi ukugxila akunamandla ngokwanele uma ubheka eduze, okuzokwandisa umthwalo emehlweni. , izimpawu ezifana nobuhlungu bamehlo, umbono ofiphele, kanye nekhanda elibuhlungu yizimpawu ezivamile.
Isimiso samalensi amaningi aqhubekayo
Umgomo wokuklama wamalensi amaningi ukudala amaphuzu amaningi okugxila okude, okuphakathi kanye nokuseduze okubonakalayo kulensi eyodwa. Ngokuvamile, ingxenye engenhla yelensi iwukuba namandla okubuka kude, ingxenye engezansi iwukuba amandla okubuka eduze, kanti ingxenye ephakathi yelensi iyindawo eqondile edlula kancane amandla okubuka. Isikhungo esiseduze se-optical samalensi amaningi amaningi angama-multifocal singama-10-16 mm ngaphansi kwesikhungo esikude se-optical kanye nama-2-2.5 mm ngamakhala. Kufanele kuqashelwe ukuthi kunezindawo eziguquguqukayo kuzo zombili izinhlangothi ze-progressive zone. Lapho umugqa wokubona uthuthela kule ndawo, into ebonakalayo izokhubazeka, okwenza kube nzima futhi kungakhululeki ukuyibona.
Indlela yokusebenzisa amalensi e-progressive multifocal
Amalensi amaningi aqhubekayo andisa kancane kancane amandla kusukela phezulu kuya phansi, futhi ahlinzeka ngezindawo ezintathu ezifihliwe zamalensi aqhubekayo, amboza umbono okude, ophakathi nendawo, noseduze, aveza ngokucacile indawo ebangeni elihlukile. Uma ugqoka izibuko eziningi eziqhubekayo okokuqala, insimu yokubona ezinhlangothini zombili zamalensi ingase igobe futhi iphambukiswe. Lapho isikhundla sohlaka sihamba noma sigobile, singase futhi sibangele ukungakhululeki kanye nombono ofiphele. Landela izinyathelo "zokuthula kuqala bese uhamba, kuqala ngaphakathi bese uphuma" ukuze uzijwayeze kancane kancane futhi uzivumelanise nezimo.
01. Indawo yelensi ye-Telephoto
Uma ushayela noma ubheka, gcina isilevu sakho singene ngaphakathi kancane, gcina ikhanda lakho liqonde phezulu, bese ubheka phakathi nelensi phezulu kancane.
02. Indawo yelensi yebanga eliphakathi
Uma ushayela noma ubheka, gcina isilevu sakho singaphakathi kancane, gcina ikhanda lakho liqonde phezulu, bese ubheka phakathi nelensi phezulu kancane. Ungashukumisa intamo yakho kancane phezulu naphansi kuze kube yilapho isithombe sicacile.
03. Indawo yelensi eseduze
Uma ufunda incwadi noma iphephandaba, yibeke ngqo phambi kwakho, welule isilevu sakho kancane phambili, bese ulungisa amehlo akho phansi endaweni efanele yesibuko.
04. Indawo yesibuko esifiphele
Kunezindawo ezinhlangothini zombili zelensi lapho ukukhanya kushintsha khona, futhi insimu yokubona izofiphala. Lokhu kuvamile.
05. Iziphakamiso:
Ukwenyuka nokwehla izitebhisi: Yehlisa ikhanda lakho kancane bese ubheka phansi, bese ulungisa ukubona kwakho kusukela endaweni eseduze nesibuko kuya endaweni yesibuko esiphakathi noma esikude.
Ukuhamba nsuku zonke: Uma ukuthola kunzima ukugxila, zama ukubheka imitha elilodwa ngaphambili ukuze ulungise ukugxila. Sicela wehlise ikhanda lakho kancane uma ubheke eduze.
Ukushayela noma ukusebenzisa imishini: Uma udinga ukubheka kude kuya eduze, emaceleni noma ema-engeli amaningi ngenkathi usebenza, sicela wenze kanjalo kuphela ngemva kokuba usujwayele ngokuphelele amalensi aqhubekayo.
Isikhathi sokuthunyelwe: Disemba-01-2023