Empilweni, sihlala sibheka izindawo ezihlukile ukusuka kude ukuya kude, okuyinto elula kakhulu kubangani abajwayelekile, kepha yehlukile kubantu abampofu kakhulu, okuyinkinga enzima kakhulu noma ekhathazayo.
Ungayixazulula kanjani le nkinga? Vele kuyizibuko ze-auxiliary, abantu be-monyopic abanezibuko, bangabona abantu abakude, bakwazi ukubona abantu izibuko bangabona eduze, kepha kunenkinga yokubheka kude, lapho kubhebhetheke kakhulu, futhi kuyafana ngokugqoka izibuko ukuze ubone eduze. Ungayixazulula kanjani kangcono le nkinga? Manje kunesixazululo salokhu kungafani: izibuko ze-multifosal ezithuthukayo.
Leyo ndaba yalesi sihloko - amalensi we-multifocal aphezulu.
Ama-lens athuthukayo anhlobonhlobo, elaziwa nangokuthi ama-lens athuthukayo, anamaphoyinti amaningi okugxila kwilensi eyodwa njengoba igama lisho. Uma ilensi ihlukaniswe ngokugxila, i-lens ingahlukaniswa ibe yilensi yokugxila eyodwa, i-lens egxile kabili, lens egxile eningi.
Ama-lens ethu ajwayelekile ama-lens agxile okukodwa, lapho kukhanya kuphela okukhanyayo kumalensi;
Ilensi yeBifocal iyilensi ye-bifocal, eyayisetshenziselwa ukusetshenziselwa abantu abaningi asebekhulile ukuxazulula inkinga yokubona kude ngasikhathi sinye. Kodwa-ke, ngenxa yokushiyeka kwalo okukhulu kanye nokuthandwa kokugxila okuningana okuphezulu, ilensi ye-bifocal isiqediwe ngokuyisisekelo;
· Ndawoti emlandweni we-Lens Development, ilensi eminingi nayo izoba yisiqondisi esikhulu socwaningo lwesikhathi esizayo kanye nentuthuko kanye nokuthandwa kwemakethe.
Umlando wokuzalwa kanye nentuthuko yelensi ye-multifocal eqhubekayo:
Ngo-1907 oves aves kuqala ukubeka phambili umqondo welensi ye-multifocal eqhubekayo, umaka ukuzalwa komqondo omusha wokulungiswa kombono.
Idizayini yale lens ekhethekile iphefumulelwe ukwakheka kwesiqu sendlovu. Lapho i-curvature ye-lens yangaphambili yelensi inyuswa ngokuqhubekayo kusuka phezulu kuya phansi, amandla okuvula angashintshwa ngokufanele, okungukuthi, amandla okusula anda kancane kancane futhi ngokuqhubekayo esuka endaweni engenhla ye Ilensi kuze kube yilapho indawo eduzane ezansi kwe-lens ifinyelela ku-Diopter Inombolo.
Ngokwesisekelo sokukhulelwa kwangaphambilini, nangosizo lwempumelelo entsha ekwakhiweni nasekuthuthukisweni okunikezwe ubuchwepheshe besimanje, ngo-1951, i-French Man Metenez yaklama ilensi yokuqala eqhubekayo yomqondo wanamuhla, ongasetshenziselwa ukugqokwa komtholampilo. Ngemuva kokuhlaziywa okuningi, kwangeniswa okokuqala emakethe yaseFrance ngo-1959. Umqondo wawo omusha wokulungiswa okubonakalayo okutholakele emhlabeni wonke futhi wangeniswa ngokushesha e-Continental Europe naseNyakatho Melika.
Ngokuthuthukiswa kwekhompyutha kanye nokusetshenziswa kwesoftware ethuthukisiwe yokwakhiwa kanye namathuluzi ekwakheni nasekuthuthukisweni kwezibuko zamehlo, idizayini ye-lens ethuthukayo ithole intuthuko enkulu. I-General Trend yilena: kusuka ku-single, kanzima, slimetric kanye ne-spherical far-zone design ukuze ihlukaniswe, ithambile, i-asymmetric kanye ne-apperic zone design. Ekwakhiweni kokuqala kwesibuko esithuthukayo, abantu ikakhulukazi babheka izinkinga zezibalo, ezenziwe ngomshini nezengqondo. Ngokuqonda okuphelele kohlelo lokubuka, ukwakheka kwesibuko kwanamuhla nokuzayo kuzogxila ebudlelwaneni obuphakathi kwesibuko esiqhubekayo kanye ne-optiological optics, ama-ergonomics, ama-aesthetics, i-psychophysics.
Ngemuva kwezinto ezintsha ezinkulu, amalensi athuthukayo abe yisinqumo sokuqala sokulungiswa kombono emazweni aseNtshonalanga Europe athuthuka njengeFrance neJalimane, nezinhlobo eziningi zelensi kanye nabantu abaningi abagqoke ilensi ephezulu. EJapan nase-United States, ukugqokwa kwe-lens ethuthukayo kunenkambiso eyandisa njalo ngonyaka. Esifundeni sase-Asia-Pacific naseMpumalanga Yurophu, ngokukhuthaza izifundo zezemfundo ze-Optometry ezine-lens eqhubekayo efanelekile njengemongodi, iningi nokwengeziwe ama-Optometrists kanye ne-Optometrists esebenzisa i-lens eqhubekayo njengokhetho olubalulekile lokulungiswa kombono.
Ngubani lens eguqukayo ye-multifocal efanelekile?
1. Inhloso yasekuqaleni yelensi egxile ehlukahlukene ukuhlinzeka indlela yokulungisa yemvelo, elula nenethezekile yeziguli ze-Presbyopia. Ukugqoka i-lens eqhubekayo kufana nokusebenzisa ikhamera yevidiyo. Ingilazi ezimbili zingabona izinto ezikude, eziseduze neziphakathi. Ngakho-ke, sichaza ama-lens athuthukayo njenge- "lens asondeza". Ngemuva kokugqoka izibuko eyodwa, kuyafana nokusebenzisa ama-Multiple Pary of Glaes.
2. Ngocwaningo lwe- "Myopia Development and Remonds Theory", amalensi we-multifocial multifocal asetshenziswe kancane kancane ukulawula ukuthuthukiswa kwe-Myopia ekhule ebusheni.
Izinzuzo zelensi ye-multifocal eqhubekayo
1. Ukubonakala kwelensi kuyafana nalokho kwe-monophoscope, futhi akukho nomugqa wokuhlukanisa wokushintsha degree ongabonakala. Ubuhle belensi livikela isidingo sogqokayo sokugcina iminyaka yakhe yangasese, futhi liqede ukukhathazeka okugqokile mayelana nokuveza ubusuku bakhe obumfihlo ngokugqoka ama-biforals esikhathini esedlule.
2, ukuguqulwa kwe-lens degree igxathu ngesinyathelo, ngeke kukhiqize ukugxuma kwesithombe. Unethezekile ukugqoka, kulula ukuzivumelanisa nezimo.
I-3, i-lens degree ihamba kancane kancane, ukusuka kude ukuyondela ukuguqulwa kokwenyuka kancane kancane, ngeke kukhiqize ukuguquguquka kokulungiswa kwamehlo, kungekho lula ukudala ukukhathala okubonakalayo.
4. Umbono osobala ungatholakala kuwo wonke amabanga ngaphakathi kombono. Ingilazi ezimbili zingasetshenziselwa kude, eduze naphakathi namabanga aphakathi ngasikhathi sinye.
Izindlela zokuqapha zelensi eqhubekayo ye-multifocal
1. Lapho uhambelana nezibuko, khetha ifreyimu enkulu yohlaka.
Ngoba i-lens kufanele ihlukaniswe kuze kube manje, maphakathi nasezindaweni eziseduzane, kuphela uhlaka olukhulu kuphela olungaqinisekisa indawo eyanele eseduze. Kungcono ukufanisa ifreyimu ephelele, ngoba kukhudlwana ilensi, ubukhulu bama-lens onqenqemeni, ifreyimu ephelele slot ingamboza ubukhulu be-lens onqenqemeni.
2 Ngokuvamile kudinga isonto lesikhathi sokuzivumelanisa nezimo, kepha ubude besikhathi sokushintshana buyahlukahluka kuye ngomuntu, bahambe kancane lapho isiyezi.
3. Ngoba izinhlangothi zombili zelensi ziyindawo ye-astigmatic distriat, kunzima ukubona izinto ezinhlangothini zombili ngokusebenzisa ibhola elikhanyayo, ngakho-ke kuyadingeka ukushintshanisa intamo ne-eyeball ngasikhathi sinye ukubona kahle.
4. Lapho wehla ezansi, gcina izibuko zakho ziphansi bese uzama ukubona endaweni ephezulu ephezulu.
Isikhathi sePosi: Sep-27-2022