Nangona iilensi eziqhelekileyo zinokuhlangabezana neemfuno zabantu zemihla ngemihla, kodwa ngenani labantu abathembekileyo, ngokweemeko ezahlukeneyo zokusebenzisa, abavelisi beelensi bayile iilensi ezisebenzayo.
Umzekelo, iilensi ze-anti-blue kwiifowuni eziphathwayo kunye neekhompyuter, iilensi zokwenza izinto zangaphandle ehlotyeni, ebusuku zokuqhuba ebusuku rhoqo, kunye neelensi eziqhubayo kubantu abathile ...
YintoniI-lens ye -ustifocal ye -usus?
Ngokwenyani, inokwaziwa ukuba luhlobo lweelensi eziqulunqwe ngamanqaku aphezulu kunye needigri ezahlukeneyo.
Ngokubanzi, kukho iindawo ezine: Indawo ekude, indawo ekufuphi nendawo, indawo eqhubekayo, indawo yasekhohlo nasekunene kwendawo yokuphelisa i-desforhes (ebizwa ngokuba yindawo ye-peipheral okanye indawo ye-fuzzy).
I-lensi inobume obungabonakaliyo kwaye iphazamisa i-parint ~
Iilensi ezihambelanayozilungele abantu
Ngokwenyani, iikhrayitheriya zokugweba ukuba umntu ulungele ukunxiba iilensi zenkqubela phambili kufuneka uzimisele ngokweemfuno zabathengi. Emva kokumisela ukuba ngaba abathengi bafanelekile ukuba abantu bangabasebenzi, abasebenzi bethu kufuneka benze i-opystry echanekileyo kubo ukuze baqiniseke ukuba banamayeza afanelekileyo eeglasi.
Izalathiso zeIilensi ezihambelanayo
1. Kunzima ukubona kufutshane, ke iiglasi zokufunda ziyafuneka, ngethemba lokuphepha ingxaki ebangelwa kukutshintshwa kweeglasi ngenxa yabantu abalumkileyo.
2. Abacebisi abangonelisekanga kukubonakala kwee-biifocals okanye oobuxoki.
3. Abantu abakwiminyaka yabo engama-40 kunye ne-50s abangena kwi "Pressopia".
4. Jonga kude kwaye kufutshane nabantu abatshintsha rhoqo: ootitshala, izithethi, abalawuli.
5. Unxibelelwano noluntu (umz., Iinkokheli zikarhulumente zinxiba iilensi ze-stitoocal).
Ukuphikisana kweIilensi ezihambelanayo
1. Kudala ukubona abasebenzi abasondeleyo: njengekhompyuter kakhulu, abapeyinti, abaqulunqi, imizobo yoyilo yoyilo;
2. Umsebenzi okhethekileyo: njengoogqirha bamazinyo, oonolayibrari, (ngenxa yobudlelwane bokusebenza, bahlala besebenzisa i-lensi yelensi ukuze babone i-Pilos, oomatiloshe (basebenzise umphezulu welensi) okanye usebenzise umda ophezulu we ilensi yokubona inani ekujoliswe kubo, ukuhamba okuphezulu, umthambo;
I-3. Izigulana ezine-anisometropiya: Omabini la maxesha nge-anisometropia> 2.00D, isidanga sekholamu esebenzayo> 2.00D, ngakumbi i-asymmetry ye-asymmetry;
I-4.ADD engaphezulu kwe-2.50d ("kufutshane (" kufutshane ("kufutshane", ebonisa ukuba amehlo aphuhlise iPrestoyopia, kufuneka unyuse iiglasi zokufunda ezingama-250.);
5. Ngaphezulu kweminyaka engama-60 ubudala (kuxhomekeke kwimeko yezempilo);
I-6.
7. Abanye abaguli abaneempawu zamehlo (i-Glaucoma, ikhathalogu), i-Strabism, isidanga siphezulu kakhulu akufuneki sinxibe;
8. Ukugula kwentshukumo: kubhekiswa kwindibaniselwano yobusi kunye nesiyezi ebangelwa ngumsebenzi wokulinganisa ongalunganga wokuziqhelanisa nokuziqhelanisa nokugula, ukugula, njl njl.; Ukongeza, izigulana ezinoxinzelelo lwe-arteriossios, xa isifo sazo asilawulwa ngokufanelekileyo, zihlala zivela ngenxa yokunikezelwa kwegazi, ngamanye amaxesha kunokubangela i-vasospasm, kunye nentloko;
9. Abantu abanobunzima ekufezekiseni iiglasi;
Isitshixo ukuyaIilensi ezihambelanayo: I-opypry echanekileyo
Ubunzulu bunzulu, kwaye ukuba noxinzelelo lunzulu.
Ngenxa yobunye beelensi ze-stitoocal ye-stitoocal eqhubekayo xa kuthelekiswa neelensi zokukhanya ezikhanyayo, iilensi ezinokuqhubela phambili akufuneki zanelise kuphela umbono olungileyo kwingingqi ekufutshane, kodwa ithathe inxaxheba kwilensi yokukhanya ukhululekile ukunxiba.
Ngeli xesha, ukuqaqanjelwa kokukhanya okukhulu "kufanele kube kusekwe ekusebenziseni okuhle okukufutshane, ngoko ke i-mypia lounosts akufuneki ibe" nzulu "kakhulu" Ngapha koko, "ukhulu kakhulu" eyongeziweyo kuya kubangela intuthuzelo yeelensi ukuze unciphise.
Kwindawo yokuqinisekisa ukuba umbono wokukhanya kude ucacile kwaye ukhululekile ngaphakathi koluhlu olululo, ukukhanya okude kweelensi zenkqubela phambili kufuneka kube lula kwaye kunzulu.
Ukukhetha kunye nokulungelelaniswa kweI-lens eqhubayoizakhelo
Ugxininiso olunezinto ezininzi lubaluleke kakhulu ekukhetheni isakhelo esifanelekileyo kwaye sihlengahlengise. Ingqwalaselo ekhethekileyo kufuneka ihlawulwe kula manqaku alandelayo:
Ukuzinza kwesambeko kulungile, ngokuhambelana nemo yobuso bomthengi, ngokubanzi akufuneki khetha isipho esilula sesakhelo sezikhewu, ukuqinisekisa ukuba i-curvature yefreyimu yesakhelo kunye ne-curvature ye-DEACERMS iyahambelana.
Isakhelo kufuneka sibe nobude obungaphezulu, ekufuneka sikhethwe ngokohlobo lweelensi ezikhethiweyo. Ngaphandle koko, kulula ukusika inxalenye yembono xa usika umphetho:
Indawo yeMedial yempumlo yelensi iya kwanela ukuba ihlalise indawo yeGradial; Isakhelo sokuvalwa kweRay kunye nezinye iifreyimu ezikwindawo enkulu engaphantsi kwempumlo kufutshane nendawo yombono incinci kunesakhelo esiqhelekileyo, ngoko ayifanelekanga isibuko esiqhelekileyo.
Umgama wamehlo kwi-lens yesakhelo (umgama phakathi kwe-Potertex ye-Potertex yelensi kunye ne-vertex yase-cornea, ebizwa ngokuba yi-vertea, ebizwa ngokuba incinci ngaphandle kokuchukumisa i-elashes.
Lungisa i-angle yangaphambili yesakhelo ngokwembonakalo yobuso (emva kokuba isakhelo senziwe, i-engle ye-inverser ephakathi kwe-10-15 i-rickess, ukuba iqondo likhulu kakhulu, ukuba iqondo likhulu kakhulu, I-angle yangaphambili inokuhlengahlengiswa ibe nkulu), ukuze ihambelane nesakhelo ngobuso kangangoko sinako, ukuze sincedise ukugcina intsimi yaneleyo yokufumana kancinci kancinci.
I-Post Tim-05-2022