Ukuthola Okufanelekile: Umhlahlandlela Wezibuko Zakho Ezilandelayo
Wake waba kulesi simo? Ngemva kokuqeda ukuhlolwa kwamehlo akho nokukhetha uhlaka lwezibuko zamehlo, ucabanga ukuthi konke sekuqediwe, bese udideka uma kukhulunywa ngokukhetha amalensi akho. Umthengisi ukuhlinzeka ngezinketho eziningi: lena iyindilinga, leyo iyindilinga, futhi kukhona nezivimbela ukukhanya okuluhlaza okwesibhakabhaka, kanye nezivimbela ukukhathala... Yikuphi okufanele ukukhethe? Ngokungazelelwe, uphelelwa amandla! Zonke ziyi-lens ezikhanyayo, pho kungani kunomehluko omkhulu kangaka? Ingabe umthengisi uzama ukukukhohlisa, noma ingabe kukhona ulwazi oluningi ngemuva kwawo?
Iqiniso liwukuthi, kuningi okufanele ukwazi ngamalensi. Ukukhetha okufanele kuzokwenza izibuko zakho zibe ntofontofo futhi zibone kahle. Khetha ezingalungile, futhi ngeke nje uchithe imali kodwa futhi ungase uphazamise ikhwalithi yokubukeka kwakho.
Namuhla, ake sibheke amalensi okukhanya avame kakhulu emakethe.
Amalensi okubona okukodwa anamandla afanayo okubuka kuwo wonke amalensi, ahambisana nomfundi wakho ngesikhathi senqubo yokukhiqiza izibuko.
Amalensi okubona okukodwa ngokuvamile ahlukaniswa ngamalensi angaphezulu ayindilinga, aspherical, aspherical aphindwe kabili, kanye namalensi angenasimo samahhala.
Amalensi angaphezulu anomumo okhululekile njengamanje asebenza kakhulu ekunciphiseni ukuphambuka kanye nokuphambuka kokubona, kodwa futhi abiza kancane kunamanye amalensi. Lapho ukhetha amalensi, cabanga ngemithi yakho kanye nezinga le-astigmatism yakho.
Amanothi:
Amalensi okubona okukodwa afanele abantu abanezidingo ezilula zokulungisa umbono. Kubantu abaqala ukuba ne-presbyopia, lawa malensi okubona okukodwa awakwazi ukuhlangabezana nezidingo zawo zokubona ngebanga elihlukile.
2. Amalensi asebenzayo
Uma amalensi okubona okukodwa enganele ukusetshenziswa kwansuku zonke, sekuyisikhathi sokukhetha amalensi asebenzayo.
Kunezinhlobo eziningi zamalensi asebenzayo, okuhlanganisa: amalensi aduduzayo, amalensi e-bifocal, amalensi e-progressive multifocal, amalensi okulawula i-myopia (ikakhulukazi izinhlobo ezahlukene zamalensi akhiwe ngendlela encane), njalo njalo.
Amalensi e-progressive multifocal ayisibonelo esihle sezibuko zamehlo ezingahlangabezana nezidingo zokubona zosuku lonke zabantu abane-presbyopia. Isibonelo, uthisha udinga ukuxhumana nabafundi (ukubona ibanga), abheke izinhlelo zezifundo (ukubona eduze), futhi abhale ebhodini (ukubona okuphakathi) ngenkathi efundisa. Ngokufanayo, emhlanganweni womnyango, othile angadinga ukubuka isikrini esikhulu, ahlole isikrini sekhompyutha, futhi abheke imizwa yababekhona. Izibuko ze-progressive multifocal ziyasiza kakhulu kulezi zimo.
Izibuko zamehlo eziqhubekayo zingaxazulula inkinga yokubona okucacile ebangeni elihlukahlukene, futhi akukho mehluko kumalensi okubona okukodwa ngokubona. Kodwa akulula njengamalensi okubona okukodwa ngokuphathelene nokuhlolwa kwamehlo, ukukhethwa kwamalensi, kanye nokucubungula.
Nazi izinyathelo zokufaka amalensi aqhubekayo:
① Kala ibanga ngokunembile.
② Kala umugqa kadokotela oseduze.
Imithi eseduze kufanele inqunywe ngokusekelwe ezivivinyweni eziningi, okuhlanganisa ubudala, ibanga elijwayelekile eliphakathi nendawo kanye neliseduze nendawo yokusebenza, indawo yamehlo, impendulo efanelekile, kanye nokuhambisana okuhle/okungekuhle/okuhlobene nendawo yokusebenza. Bese ukhetha ubude bendlela efanele (okungukuthi, ubude bendawo yokuguquka phakathi kwebanga kanye nezindawo zokubona eziseduze nelensi) ukuze kuhlangatshezwane nezidingo zomsebenzi wansuku zonke.
③ Ukulungiswa kohlaka okwenziwe ngokwezifiso
Lungisa uhlaka ngokwezici ngazinye njengokuphakama kwebhuloho lekhala, ukuphakama kwendlebe, njll., ukuze wenze izibuko zibe ntofontofo ukuzigqoka.
④ Ukulinganisa ibanga nokuphakama kwengane encane
Kala ibanga le-pupillary eliyi-monocular ngokwehlukana ukuze uthole ibanga kanye nombono oseduze. Kala ukuphakama kwe-pupillary eliyi-monocular (ukuphakama okuqondile komfundi ohlakeni) bese ukumaka ohlakeni olukhethiwe. Lokhu kuqinisekisa ukuthi izindawo zebanga kanye nombono oseduze zamalensi aqhubekayo zihambisana nezindawo ze-pupillary ezifanele, kufezwe imiphumela emihle yokubona futhi kuncishiswe umthelela wokuphambuka.
⑤ Ukulinganiswa Kwamapharamitha Engeziwe
Ukuklama amalensi athuthukayo akhululekile kudinga nokulinganisa amapharamitha engeziwe: ibanga eliphakathi kobuso obungaphambili be-cornea kanye nobuso obungemuva belensi), ukugoba kobuso befreyimu, i-engeli yokuthambekela phambili kohlaka, ukuma kohlaka kanye nosayizi, njll. Ngokuhlanganisa la mapharamitha kanye nesilinganiso sokunyakaza kwekhanda neso, ukukhetha ilensi efanele enganciphisa imiphumela yezindawo eziguquguqukayo ezinhlangothini zombili zelensi, ifinyeze isikhathi sokuzivumelanisa nezimo, futhi ithuthukise induduzo yokugqokwa.
⑥ Ukucubungula Izibuko Zamehlo
Ukucubungula izibuko zamehlo akukhona nje ukugaya amalensi nokuwafaka ozimeleni. Kulawulwa ngokuqinile yizindinganiso zikazwelonke. Isibonelo, amandla elensi uqobo kumele ahlangabezane nezindinganiso zikazwelonke. Ngesikhathi sokucubungula, i-axis ye-astigmatism, ibanga le-pupillary, kanye nokuphakama kwe-pupillary kwelensi kumele kufane namanani alinganisiwe. Lapho amalensi efakwe ozimeleni, azoba ngaphansi kwamandla, okungafanele abe phezulu kakhulu noma aphansi kakhulu. Ukucubungula okufanele kubalulekile ukuqinisekisa ukulingana okuhle.
Ngakho-ke, lapho ukhetha amalensi, akukhona ukuthi uma amalensi ebiza kakhulu, angcono kakhulu. Kufanele ucabangele izici eziningi ezifana ne-diopter, imingcele yamehlo, kanye nezinhlobo zamalensi. Gwema ukugxila kuphela kumkhiqizo noma intengo, futhi akwamukeleki nakakhulu ukukhetha ngokungacabangi noma ngokungahleliwe.
Kufanele ukhethe ozimele namalensi afanele ngokusekelwe kwiseluleko sochwepheshe bokunakekelwa kwamehlo (odokotela bamehlo, odokotela bamehlo, noma ngisho nochwepheshe bokulungisa uzimele), futhi kuhlanganiswe nezidingo zakho zokubona.