Empilweni sihlala sibheka izindawo ezahlukene ukusuka kude kuya kude kuya kude, okulula kakhulu kubangani abajwayelekile, kodwa kuhlukile kubantu abangaboni kahle, okuyinkinga enzima kakhulu noma ekhathazayo.
Indlela yokuxazulula le nkinga?Yiqiniso, izibuko ezisizayo, abantu abanezingilazi ze-myopic, bangabona kude, abantu ababona kude abanezibuko bangabona eduze, kodwa inkinga ifika, ukugqoka izibuko ukuze ubone kude, uma ubheka eduze, ngeke ukhululeke kakhulu, futhi okufanayo. ngezibuko zokubona eduze.Indlela yokuxazulula kangcono le nkinga?Manje kunesixazululo salokhu kuxaka: izibuko ze-multifocal eziqhubekayo.
Yilokho isihloko salesi sihloko - amalensi amaningi aqhubekayo.
Amalensi ezinto eziningi aqhubekayo, aziwa nangokuthi amalensi aqhubekayo, anamaphuzu amaningi okugxila kulensi eyodwa njengoba igama lisho.Uma i-lens ihlukaniswa kusukela ekugxilweni kuyo, ilensi ingahlukaniswa ibe ilensi yokugxila eyodwa, ilensi yokugxila ekabili, ilensi yokugxila eminingi.
· Amalensi ethu ajwayeleke kakhulu amalensi agxile ngakunye, lapho kunokukhanya okukodwa kuphela kumalensi;
· I-Bifocal lens iyilensi ye-bifocal, eyayisetshenziswa abantu abaningi asebekhulile ukuxazulula inkinga yokubona kude naseduze ngesikhathi esisodwa.Kodwa-ke, ngenxa yokushiyeka kwayo okukhulu kanye nokuthandwa kwe-multi-focus eqhubekayo, i-bifocal lens isusiwe ngokuyisisekelo;
· Njengengqopha-mlando emlandweni wokuthuthukiswa kwamalensi, ilensi ye-multifocal izophinde ibe inkomba eyinhloko yocwaningo lwesikhathi esizayo nentuthuko kanye nokuthandwa kwezimakethe.
Ukuzalwa nokuthuthuka Umlando welensi eqhubekayo ye-multifocal:
Ngo-1907 u-Owen Aves waqala ukubeka phambili umbono welensi ye-multifocal eqhubekayo, ephawula ukuzalwa komqondo omusha wokulungisa umbono.
Ukwakheka kwale lens ekhethekile kugqugquzelwa ukuma komboko wendlovu.Lapho ukugoba kwendawo yangaphambili yelensi kukhushulwa ngokuqhubekayo ukusuka phezulu kuye phansi, amandla okuvuselela angashintshwa ngokufanele, okungukuthi, amandla okuhlaziya akhula kancane kancane futhi ngokuqhubekayo ukusuka endaweni ekude etholakala engxenyeni engenhla ye-lens. ilensi kuze kube indawo eseduze ezansi kwelensi ifinyelela inombolo edingekayo eduze nenombolo ye-diopter.
Ngesisekelo sokukhulelwa kwangaphambili, futhi ngosizo lwempumelelo entsha ekwakhiweni nasekuthuthukisweni okuhlinzekwa ubuchwepheshe besimanje, ngo-1951, indoda yaseFrance uMetenez yaklama ilensi yokuqala eqhubekayo yomqondo wesimanje, engasetshenziselwa ukugqokwa komtholampilo.Ngemva kokulungiswa okuningi, yethulwa okokuqala emakethe yaseFrance ngo-1959. Umqondo wayo omusha wokulungisa okubukwayo wathola ukunakwa emhlabeni wonke futhi ngokushesha wethulwa ezwekazini lase-Europe naseNyakatho Melika.
Ngokuthuthukiswa kwekhompuyutha kanye nokusetshenziswa kwesofthiwe yokuklama ethuthukisiwe nezinsimbi ekwakhiweni nasekuthuthukisweni kwezibuko zamehlo, ukwakheka kwelensi okuqhubekayo kuzuze intuthuko enkulu.Umkhuba ojwayelekile uthi: kusukela ekwakhiweni kwendawo ekude eyodwa, eqinile, elinganayo kanye neyindilinga ukuya ekwakhiweni kwendawo ekude ehlukahlukene, ethambile, e-asymmetric kanye ne-aspheric yendawo ekude.Ekwakhiweni kokuqala kwesibuko esiqhubekayo, abantu babebheka ikakhulukazi izinkinga zezibalo, zemishini nezokubona.Ngokuqonda okubanzi kohlelo lokubonwayo, idizayini yesibuko eqhubekayo nesimanjemanje izogxila kakhulu ebudlelwaneni phakathi kwesibuko esiqhubekayo kanye ne-physiological optics, i-ergonomics, i-aesthetics, i-psychophysics.
Ngemuva kokuqanjwa okusha okuningana, ilensi eqhubekayo isibe yinketho yokuqala yokulungiswa kombono emazweni athuthukile aseNtshonalanga Yurophu njengeFrance neJalimane, anezinhlobo eziningi zamalensi kanye nabantu abaningi abagqoka ilensi eqhubekayo.E-Japan nase-United States, ukugqokwa kwelensi okuqhubekayo kunomkhuba okhulayo osobala minyaka yonke.Esifundeni sase-Asia-Pacific naseMpumalanga Yurophu, ngokugqugquzelwa kwezifundo zemfundo ye-optometry ngokufaka ilensi eqhubekayo njengomongo, bayanda odokotela bamehlo nodokotela bamehlo babheka ilensi eqhubekayo njengenketho ebalulekile yokulungiswa kombono.
Ubani i-progressive multifocal lens efanelekayo?
1. Inhloso yasekuqaleni ye-multi-focal lens ukuhlinzeka ngendlela yemvelo, elula nenethezekile yokulungisa iziguli ze-presbyopia.Ukugqoka ilensi eqhubekayo kufana nokusebenzisa ikhamera yevidiyo.Ipheya lezibuko likwazi ukubona izinto ezikude, eziseduze namaphakathi ngokucacile.Ngakho-ke, sichaza amalensi aqhubekayo njengokuthi "amalensi asondeza".Ngemva kokugqoka ipheya eyodwa yezibuko, kulingana nokusebenzisa amapheya amaningi ezingilazi.
2. Ngocwaningo "lwe-myopia development and regulation theory", amalensi e-multifocal aqhubekayo asetshenziswe kancane kancane ukulawula ukuthuthukiswa kwe-myopia entsheni.
Izinzuzo zamalensi e-multifocal aqhubekayo
1. Ukubukeka kwelensi kuyafana nalokho kwe-monophoscope, futhi akukho mugqa ohlukanisayo wokushintsha kwezinga ongabonakala.Ubuhle belensi buvikela isidingo somuntu ogqokile sokugcina iminyaka yakhe ngasese, futhi buqeda ukukhathazeka kwalowo oyigqokile ngokudalula imfihlo yobudala bakhe ngokugqoka ama-bifocal esikhathini esidlule.
2, ukuguqulwa kwe-lens degree step by step, ngeke kukhiqize ukugxuma kwesithombe.Kuyanethezeka ukugqoka, kulula ukuzivumelanisa nezimo.
I-3, i-lens degree ihamba kancane kancane, ukusuka kude kuya eduze noshintsho lokwanda kancane kancane, ngeke kukhiqize ukushintshashintsha kokulungiswa kwamehlo, akulula ukubangela ukukhathala okubukwayo.
4. Ukubona kahle kungatholakala kuwo wonke amabanga ngaphakathi kobubanzi bokubona.Ipheya lezibuko lingasetshenziswa ezindaweni ezikude, eziseduze namaphakathi ngesikhathi esisodwa.
Izinyathelo zokuphepha zelensi ye-multifocal eqhubekayo
1. Uma ufanisa izibuko, khetha ifreyimu enkulu yohlaka.
Ngenxa yokuthi ilensi kufanele ihlukaniswe ibe izindawo ezikude, ezimaphakathi, neziseduze, uhlaka olukhulu kuphela olungaqinisekisa indawo ebanzi ngokwanele ukuze isetshenziswe eduze.Kungcono kakhulu ukufanisa ifreyimu egcwele, ngoba uma i-lens inkulu, uma unqenqema lwe-lens lukhudlwana, i-slot yefreyimu egcwele ingamboza ukujiya konqenqema lwamalensi.
2 ngokuvamile udinga isikhathi esingangesonto lesikhathi sokuzivumelanisa nezimo, kodwa ubude benkathi yokujwayela buyahlukahluka kumuntu nomuntu, hamba kancane uma unesiyezi.
3. Ngenxa yokuthi izinhlangothi ezimbili ze-lens ziyindawo ye-astigmatic disorder, kunzima ukubona izinto ezinhlangothini zombili ngebhola elikhanyayo elikhanyayo, ngakho-ke kuyadingeka ukuzungeza intamo ne-eyeball ngesikhathi esifanayo ukuze ubone ngokucacile.
4. Lapho ushona phansi, gcina izibuko zakho ziphansi futhi uzame ukubona endaweni ekude engaphezulu.
Isikhathi sokuthumela: Sep-27-2022