Ebomini, sihlala sijonga kwiindawo ezahlukeneyo ukusuka kude ukuya kude kude, ekulula kakhulu kubahlobo abaqhelekileyo, kodwa yahlukile ebantwini abanamehlo angahambi kakuhle, engxakini.
Ungayisombulula njani le ngxaki? Ewe kunjalo ziiglasi zeProp, abantu be-myopic ngeeglasi, babone abantu abade, abalumkileyo abaneglasi banokubona kufutshane, xa benxibe iiglasi zokubona kude, kwaye okufanayo ngeeglasi ezinxibayo ukuze ubone kufutshane. Ungcono kangakanani ukuyicombulula le ngxaki? Ngoku kukho isisombululo kolu lwazi: Iiglasi ezininzi ezihambelanayo.
Lowo ngumxholo weli nqaku - i-lenses ye -ususususususususususususus.
I-lenses ye-stitoocal eqhubela phambili, ekwabizwa ngokuba ziilensi zenkqubela phambili, zinamanqaku aphezulu kwiilensi ezininzi njengoko igama lithetha. Ukuba iilensi zahlulwe kugxile ekugxilwe kuzo, iilensi zinokwahlulwa zibe ziilensi ezimbini ezigxile kuzo, iilensi ezimbini, iilensi ezininzi.
Iilensi zezinto ezixhaphakileyo ziilensi ezigxile kuzo ziilensi ezingatshatanga, apho kukho ukuthantamisa kuphela kwilensi;
· Bifocal lens is a bifocal lens, which used to be used by many elderly people to solve the problem of seeing far and near at the same time. Nangona kunjalo, ngenxa yeentsilelo zayo ezinkulu kunye nokuthandwa kogxininiso oluninzi olunenkqubela phambili, ilensi ye-Bifocal isusiwe;
I-SINTESTRATION kwimbali yokuphuhliswa kwe-lens, iilensi ze -usus (ilensi ye-multikocal ziya kuba yeyona ndlela iphambili yophando lwexesha elizayo kunye nophuhliso kunye nokwenziwa kwentengiso.
Imbali yokuzalwa kunye nophuhliso lweelensi eziqhubekayo ze-stitofocal:
Ngo-1907 ii-ouden auden aves kuqala abeke phambili umbono weelensi eziqhubela phambili, ukumakisha ukuzalwa kombono omtsha wokulungisa umbono.
Uyilo lwale lensi ikhethekileyo iphefumlelwe ngumlo we-ndlovu yendlovu. Xa i-curvature yomphezulu wangaphambili yelensi yonyuswa ngokuqhubekayo ukusuka ezantsi ukuya ezantsi, amandla aqatha anokutshintshwa ngokufanelekileyo, oko kukuthi, ngokuqhubekayo ukusuka kwindawo ephezulu ye I-lens ide ibekwe kwindawo ekufuphi emazantsi e-lens ifikelela kwinani elifunekayo kufutshane nenombolo yediopter.
Kwisiseko sokuqonda kwangaphambili, kunye noncedo lwempumelelo entsha kuyilo nophuhliso olunikezwe yitekhnoloji yale mihla, ngo-1951, indoda yaseFransi Metenez yenze i-lens yokuqala yenkqubo yanamhlanje, enokusetyenziselwa ukunxiba. Emva kokuphuculwa okuninzi, kwasenziwa okokuqala kwimarike yaseFransi ngo-1959. Ingcinga yayo eyolisayo yoqeqesho olubonakalayo yanikela ingqalelo emhlabeni wonke kwaye yaza zaza zaza zaza zaza zaza zaza zaza zaza zaza kwilizwekazi laseYurophu naseMntla Melika.
Ngokuphuhliswa kwekhompyuter kunye nokusetyenziswa kwesoftware yoyilo yoyilo kunye nezixhobo kuyilo kunye nophuhliso lweeglasi zamehlo, uyilo lwelensi oluqhubela phambili luphumelele ukukhula. The general trend is: from single, hard, symmetric and spherical far-zone design to diversified, soft, asymmetric and aspheric far-zone design. Kukuyilwa kokuqala kwesibuko esiqhubekayo, abantu ikakhulu bathathwa njengabaqwalaseli beMathematics, oomatshini kunye neengxaki ezibonakalayo. Ukuqonda okupheleleyo ngokufezekileyo kwenkqubo yokubonakalayo, uyilo lwale mihla kwaye lwexesha elizayo uyilo luya kugxila ngakumbi kubudlelwane phakathi kwesipili esinenkqubela phambili kunye ne-opticsfickogical, i-ergonomics, i-aesthetics, i-aesthetics, i-aesthetics, i-aesthetics, i-aesthetics, i-aesthetics, i-aesthetics, psychophysics.
Emva kokhetho olukhulu kakhulu, iilensi zenkqubela phambili ziye zaba lukhetho lokuqala lokulungiswa kombono kumazwe aseNtshona Yurophu afana neFrance kunye ne-Germay, kunye nabantu abaninzi abanxibe ilensi eqhubela phambili. EJapan naseUnited States, ukunxiba i-lens inkqubela phambili kuyanda ukwanda minyaka le. Kwingingqi yeAsia-Pacific naseMpuma Yurophu, ngokukhuthaza iikhosi zemfundo e-Optometry ene-lens enenkqubela phambili njengee-aptometrists kunye nee-optometrists kunye ne-Optometrists ezihambela phambili kulungiso olubalulekileyo lokulungiswa.
Ngubani ophumeleleyo kwi-lens ye-stitowocal ye-Multical efanelekileyo?
1. Injongo yoqobo ye-lens egxile kwiilensi ezininzi kukubonelela ngendlela yendalo, efanelekileyo nefanelekileyo yokutshintsha kwendlela abaguli baseProtgoopia. Ukunxiba ilensi yenkqubela phambili kufana nokusebenzisa ikhamera yevidiyo. Iiglasi zeglasi zinokubona izinto ezikude, kufutshane nephakathi yomgama. Ke ngoko, sichaza iilensi eziqhubayo njenge "iilensi zezokusondeza". Emva kokunxiba iglasi enye, ilingana nokusebenzisa izibini ezininzi zeeglasi.
2. Ngophando ngophando lwe "Myopia uphuhliso kunye nethiyori yeMypia", iilensi ze-multitocal ezihambelanayo ziye zasebenza ngokuthe ngcembe ukulawula ukukhula kwe-myopia kwishumi elivisayo.
Iinzuzo zee-lens ezihambela phambili
1. Ukubonakala kwelensi kuyafana ne-monophoscope, kwaye akukho luhlu lokwahlula-tshintsha i-degree lunokubonwa. Ubuhle beelensi buyakhusela isidingo sokuphefumla ukugcina iminyaka yobudala bayo ngasese, kwaye isuse inkxalabo yokuphelisa ngokutyhila iminyaka yakhe icocekile ngokunxiba iiblocal zangaphambili.
2, Utshintsho lwenqanaba le-lens inyathelo ngenyathelo, ayizukuvelisa umfanekiso wokutsiba. Ukukhululeka ukunxiba, ngokulula ukuhlengahlengisa.
I-3, i-lensi ye-lensi ihamba kancinci, ukusuka kude ukuya kufutshane notshintsho lokuphucula ngokuthe ngcembe, ayizukuthemba uhlengahlengiso lokuhlengahlengiswa kwamehlo, kulula ukwenza ukudinwa okubonakalayo.
4. Umbono ocacileyo unokufumaneka kuwo wonke umgama ngaphakathi kuluhlu lombono. Iiglasi zeglasi zinokusetyenziselwa kude, kufutshane nezommiselo ngaxeshanye.
Amanyathelo okhuseleko kwiilensi eziqhubekayo
1. Xa idibanisa iiglasi, khetha isakhelo esikhulu.
Kuba ilensi kufuneka yahlulwe ibe kude, ephakathi, kwaye kufutshane nendawo, isakhelo esikhulu esinokuqinisekisa indawo eyaneleyo yokusetyenziswa. Kungcono ukutshatisa isakhelo esipheleleyo, kuba i-lens enkulu, i-lens emnyama, isakhelo esipheleleyo sinokugubungela ubukhulu be-lensi.
2 ngokubanzi kufuneka malunga neveki yexesha lokuziqhelanisa, kodwa ubude bexesha lokuguqulwa yahluka ukusuka komnye umntu, hamba kancinci xa usiya isiyezi.
3. Ngenxa yokuba la macala mabini elensi yindawo yokuphazamiseka, kunzima ukubona izinto kumacala omabini ngebhola ekhanyayo, ngoko ke kuyimfuneko ukujikeleza intamo kunye neliso.
4. Xa usiya ezantsi, gcina iiglasi zakho ziphantsi kwaye uzame ukubona ngaphandle kwendawo ephezulu kakhulu.
IXESHA LOKUQALA: UPE-27-2022