Ebomini, sihlala sijonga kwiindawo ezahlukeneyo ukusuka kude ukuya kufuphi ukuya kude, kulula kakhulu kubahlobo abaqhelekileyo, kodwa kuhluke kubantu abangaboni kakuhle, okuyingxaki enzima kakhulu okanye ephazamisayo.
Indlela yokusombulula le ngxaki?Ngokuqinisekileyo ziiglasi ezincedisayo zeprop, abantu abane-myopic abaneeglasi, banokubona kude, abantu ababona kude abaneeglasi banokubona kufutshane, kodwa ingxaki iza, ukunxiba iindondo ukubona kude, xa ujonge kufutshane, kuya kuba nzima kakhulu, kwaye okufanayo. ngokunxiba iindondo ukubona kufutshane.Indlela yokusombulula ngcono le ngxaki?Ngoku kukho isisombululo kobu bunzima: iiglasi ezininzi eziqhubekayo.
Lowo ngumxholo weli nqaku - iilensi ezininzi eziqhubekayo.
Iilensi ezininzi eziqhubelekayo, ezikwaziwa ngokuba ziilensi eziqhubelekayo, zineendawo zokugxila ezininzi kwilensi enye njengoko negama lisitsho.Ukuba i-lens yahlulwe ukusuka kugxininiso, ilensi inokwahlulwa ibe yilensi egxininisiweyo enye, ilensi egxininise kabini, ilensi egxininise kakhulu.
• Ezona ziqhelekileyo iilensi zethu ziilensi ezigxininisiweyo zodwa, apho kukho ukukhanya okunye kwilensi;
· I-Bifocal lens yi-bifocal lens, eyayidla ngokusetyenziswa ngabantu abaninzi abadala ukusombulula ingxaki yokubona kude nakufuphi ngaxeshanye.Nangona kunjalo, ngenxa yeentsilelo zayo ezinkulu kunye nokuthandwa kogxininiso oluninzi oluqhubekayo, i-bifocal lens iye yasuswa;
· Njengomgama obalulekileyo kwimbali yophuhliso lwelensi, ilensi ye-multifocal iya kuba lelona sikhokelo sophando lwexesha elizayo kunye nophuhliso kunye nokuthandwa kweemarike.
Ukuzalwa kunye nophuhliso Imbali yelensi ye-multifocal eqhubekayo:
Ngo-1907 u-Owen Aves waqala ukubeka phambili ingcamango ye-lens ye-multifocal eqhubekayo, ephawula ukuzalwa kwengcamango entsha yokulungisa umbono.
Uyilo lwale lens lukhethekileyo luphenjelelwa kukumila komboko wendlovu.Xa i-curvature ye-front face ye-lens isanda ngokuqhubekayo ukusuka phezulu ukuya ezantsi, amandla okuhlaziya anokutshintshwa ngokufanelekileyo, oko kukuthi, amandla okuhlaziya ayanda ngokuthe ngcembe kwaye ngokuqhubekayo ukusuka kwindawo ekude ebekwe kwindawo ephezulu. ilensi de indawo ekufutshane emazantsi elensi ifikelele kwinani elifunekayo le-diopter.
Ngokwesiseko sokukhulelwa kwangaphambili, kunye noncedo lwempumelelo emitsha kuyilo kunye nophuhliso olubonelelwa ngeteknoloji yanamhlanje, ngo-1951, indoda yaseFransi uMetenez wayila i-lens yokuqala eqhubekayo yengcamango yanamhlanje, engasetyenziselwa ukunxiba kweklinikhi.Emva kohlaziyo oluninzi, yaziswa okokuqala kwimarike yaseFransi ngo-1959. Ingcinga entsha yokulungiswa kwezinto ezibonakalayo yafumana ingqalelo kwihlabathi jikelele kwaye yaziswa ngokukhawuleza kwilizwekazi laseYurophu nakuMntla Melika.
Ngophuhliso lwekhompyuter kunye nokusetyenziswa kwesoftware yoyilo oluphezulu kunye nezixhobo kuyilo kunye nophuhliso lwezibuko zamehlo, uyilo oluqhubekayo lwelensi lufezekise uphuhliso olukhulu.Umkhwa jikelele kukuba: ukusuka kwi-single, hard, symmetric and spherical far-zone design to diversified, soft, asymmetric and aspheric far-zone design.Kuyilo lokuqala lwesipili esiqhubela phambili, abantu bajonga ikakhulu iingxaki zemathematika, ezoomatshini kunye nezamehlo.Ngokuqonda okubanzi ngakumbi kwenkqubo yokubonwayo, uyilo lwesipili sangoku kunye nekamva elizayo luya kugxila ngakumbi kubudlelwane phakathi kwesipili esiqhubekayo kunye ne-physiological optics, i-ergonomics, i-aesthetics, i-psychophysics.
Emva kwezinto ezininzi ezintsha, iilensi eziqhubela phambili ziye zaba lukhetho lokuqala lokulungiswa kombono kumazwe aphuhlileyo aseNtshona Yurophu anjengeFransi neJamani, kunye neentlobo ezininzi zeelensi kunye nabantu abanxiba iilensi eziqhubekayo.EJapan nase-United States, ukunxitywa kwelensi okunenkqubela kunomkhwa ocacileyo okhulayo minyaka le.Kummandla wase-Asia-Pacific naseMpuma Yurophu, ngokukhuthazwa kwezifundo zemfundo yamehlo ngokufaka ilensi eqhubekayo njengondoqo, ngakumbi nangakumbi oogqirha bamehlo kunye noogqirha bamehlo bathatha iilensi eziqhubela phambili njengokhetho olubalulekileyo lokulungiswa kombono.
Ngubani i-lens eqhubekayo ye-multifocal efanelekile?
1. Injongo yangaphambili ye-lens egxininise kakhulu kukubonelela ngendlela yendalo, elula kunye nekhululekile yokulungiswa kwezigulane ze-presbyopia.Ukunxiba ilensi eqhubekayo kufana nokusebenzisa ikhamera yevidiyo.Iperi yeglasi inokubona izinto ezikude, ezikufuphi neziphakathi ngokucacileyo.Ngoko ke, sichaza iilensi eziqhubela phambili njenge "lens ezisondeza".Emva kokunxiba iperi yeglasi enye, kuyafana nokusebenzisa iperi ezininzi zeendondo.
2. Ngophando lwe "myopia development and regulation theory", iilensi ze-multifocal eziqhubekayo ziye zasetyenziswa ngokuthe ngcembe ukulawula ukuphuhliswa kwe-myopia kulutsha.
Iinzuzo zelensi ye-multifocal eqhubekayo
1. Ukubonakala kwelensi kufana ne-monophoscope, kwaye akukho mgca wokuhlula wenguqu yedigri unokubonwa.Ubuhle be-lens bukhusela isidingo somntu onxibileyo ukugcina iminyaka yakhe ngasese, kwaye kuphelisa inkxalabo yalowo uyinxibileyo malunga nokutyhila imfihlo yakhe yobudala ngokunxiba i-bifocals kwixesha elidlulileyo.
2, utshintsho lwenqanaba lelensi ngenyathelo, aluyi kuvelisa ukutsiba komfanekiso.Ukhululekile ukunxiba, kulula ukuziqhelanisa.
I-3, idigri ye-lens ihamba ngokuthe ngcembe, ukusuka kude ukuya kufuphi nokutshintsha kokunyuka ngokuthe ngcembe, akuyi kuvelisa ukuguquguquka kwamehlo, akukho lula ukubangela ukudinwa okubonakalayo.
4. Umbono ocacileyo unokufunyanwa kuyo yonke imigama phakathi koluhlu lombono.Iperi yeglasi ingasetyenziselwa imigama ekude, ekufutshane naphakathi ngexesha elinye.
Imigqaliselo yelensi ye-multifocal eqhubekayo
1. Xa udibanisa iiglasi, khetha isakhelo esikhulu esakhelo.
Ngenxa yokuba i-lens kufuneka yohlulwe kwiindawo ezikude, eziphakathi, kunye nezikufutshane, kuphela isakhelo esikhulu esinokuqinisekisa indawo ebanzi eyaneleyo yokusetyenziswa kufutshane.Kungcono ukufanisa isakhelo esipheleleyo sesakhelo, kuba inkulu i-lens, i-lens edge edge, i-slot epheleleyo yefreyimu inokugubungela ubukhulu bomphetho we-lens.
2 ngokubanzi kufuneka malunga neveki yexesha lokuziqhelanisa, kodwa ubude bexesha lokuziqhelanisa buyahluka kumntu nomntu, hamba ngokucothayo xa unesiyezi.
3. Ngenxa yokuba amacala amabini e-lens ayindawo ye-astigmatic disorder, kunzima ukubona izinto kumacala omabini ngebhola elikhanyayo, ngoko ke kuyimfuneko ukujikeleza intamo kunye ne-eyeball ngexesha elifanayo ukuze ubone ngokucacileyo.
4. Xa usiya ezantsi, gcina iiglasi zakho zisezantsi kwaye uzame ukubona kwindawo ephezulu ekude.
Ixesha lokuposa: Sep-27-2022