Nangona iilensi eziqhelekileyo zinokuhlangabezana neemfuno zokusetyenziswa kwamehlo abantu mihla le, kodwa ngokunyuka kwenani labantu ababona kufutshane, ngokweemeko ezahlukeneyo zokusetyenziswa, abavelisi beelensi bayiyile iilensi ezisebenzayo ezisetyenziswa ngokuqhelekileyo.
Umzekelo, iilensi ezichasene nombala oluhlaza okwesibhakabhaka kwiifowuni eziphathwayo kunye neekhompyuter, iilensi eziguqukayo zokukhanya kwelanga ngaphandle ehlotyeni, iilensi zokuqhuba ebusuku zokuqhuba rhoqo ebusuku, kunye neelensi eziqhubekayo zabantu abathile...
Yintoni naiilensi ezininzi eziqhubekayo?
Ngokwenyani, ikwaziwa ukuba luhlobo lwelensi eyenziwe ngamanqaku agxininisiweyo amaninzi kunye nezidanga ezahlukeneyo.
Ngokubanzi, kukho iindawo ezine: indawo ekude, indawo ekufutshane, indawo eqhubekayo, indawo yokuguqula ngasekhohlo nasekunene (ekwabizwa ngokuba yi-peripheral area okanye indawo efuzzy).
Ilensi inoshicilelo olungabonakaliyo kunye noshicilelo oluphambili ~
Iilensi eziqhubekayozilungele abantu
Kumsebenzi wangempela, iindlela zokugweba ukuba umntu ufanelekile ukunxiba iilensi eziqhubekayo kufuneka zimiselwe ngokweemfuno zabathengi.Emva kokumisela ukuba ngaba abathengi bakulungele na abemi, abasebenzi bethu kufuneka benze i-optometry echanekileyo kubo ukuqinisekisa ukuba banomyalelo ofanelekileyo weeglasi.
Iimpawu zeiilensi eziqhubekayo
1. Kunzima ukubona kufuphi, ngoko kufuneka iiglasi zokufunda, ngethemba lokuphepha inkathazo ebangelwa ukutshintshwa kweeglasi ngenxa yabantu ababona kude.
2. Abanxibi abangonelisekanga ngenkangeleko ye-bifocals okanye i-triocals.
3. Abantu abaneminyaka engama-40 kunye ne-50 abasandul 'ukungena kwisigaba "se-presbyopia".
4. Jonga kude nakufuphi nabantu abatshintshana rhoqo: ootitshala, izithethi, abalawuli.
5. Abanxibelelanisi bakawonke-wonke (umz., iinkokeli zikarhulumente zinxiba iilensi ze-progressive multifocal).
Contraindications ofiilensi eziqhubekayo
1. Ixesha elide ukubona abasebenzi abasondeleyo: abanje ngekhompyuter kakhulu, abapeyinti, abayili bemizobo, imizobo yoyilo lwezakhiwo;
2. Umsebenzi okhethekileyo: njengoogqirha bamazinyo, oosomathala, (ngenxa yobudlelwane bokusebenza, ngokuqhelekileyo basebenzisa umphezulu welensi ukubona okufutshane) abaqhubi beenqwelo-moya, oomatiloshe (sebenzisa umphezulu wale lens ukubona ikufutshane) okanye usebenzise umphetho ophezulu welensi. i-lens ukubona abantu ekujoliswe kubo, ukuhamba okuphezulu, umthambo;
3. Izigulane ezine-anisometropia: zombini amehlo ane-anisometropia> 2.00D, i-degree yekholomu esebenzayo> 2.00D, ngakumbi i-axial asymmetry;
4.ADD ngaphezu kwe-2.50D (" kufuphi ukusetyenziswa + 2.50d ", ebonisa ukuba amehlo aphuhlise i-presbyopia, kufuneka ukwandise iiglasi zokufunda ze-250 degrees.);
5. Ngaphezu kweminyaka engama-60 ubudala (kuxhomekeke kwimeko yempilo);
6. Abo bahlala benxibe ukukhanya okuphindwe kabini ngaphambili (ngenxa yobubanzi obusondeleyo bokusetyenziswa kwendawo yokukhanya kabini kunye nommandla okufutshane wokusetyenziswa kwesibuko esiqhubekayo, kuya kubakho ukungazinzi);
7. Ezinye izigulane ezinezifo zamehlo (i-glaucoma, i-cataract), i-strabismus, i-degree iphezulu kakhulu akufanele igqoke;
8. Ukugula okuhambayo: kubhekiselele kwindibaniselwano yesiyezi kunye nesiyezi esibangelwa kukungasebenzi kakuhle kolungelelwaniso kwintshukumo ekhawulezayo yokuzimela okanye yokuzimela, njengokugula kwentshukumo, ukuguliswa kolwandle, njl.;Ukongezelela, izigulane ezine-hypertension kunye ne-arteriosclerosis, xa isifo sabo singalawulwa ngokufanelekileyo, sihlala sibonakala ngenxa yokungonelanga kwe-cerebrovascular blood supply ebangelwa yisiyezi, ngamanye amaxesha kunokubangela i-vasospasm, kunye nentloko;
9. Abantu abanobunzima bokuziqhelanisa neendondo;
Isitshixo sokuiilensi eziqhubekayo: I-Optometry echanekileyo
Ukubona izinto ezikude kunzulu, yaye ukubona kude kunzulu.
Ngenxa yobungcali belens eqhubekayo ye-multifocal xa kuthelekiswa ne-lens yokukhanya enye, i-lens eqhubekayo ye-multifocal ayifanele yanelise nje umbono olungileyo kwindawo yokukhanya okude, kodwa ithathela ingqalelo isiphumo sokwenyani kwindawo yokukhanya ekufutshane ukwenza yonke lens eqhubekayo. ukhululekile ukunxiba.
Ngeli xesha, "ukuchaneka kokukhanya okude" kufuneka kusekelwe ekusebenziseni kakuhle ukukhanya okukufutshane, ngoko ukukhanya kwe-myopia yokukhanya okude akufanele kube "nzulu kakhulu", ngelixa ukukhanya kwe-myopia yokukhanya okude akufanele kube "kunzulu kakhulu" , ngaphandle koko "inkulu kakhulu" ye-ADD iya kubangela ukuba induduzo ye-lens iyancipha.
Kwisiseko sokuqinisekisa ukuba umbono wokukhanya okude ucacile kwaye ukhululekile ngaphakathi koluhlu lwangempela lokusetyenziswa, ukukhanya okude kwelensi eqhubekayo kufuneka kungabi nzulu kwaye ukukhanya okukude kufuneka kube nzulu kwaye kunzulu nje.
Ukukhethwa kunye nohlengahlengiso lweilensi eqhubekayoizakhelo
Ugxininiso oluninzi oluqhubekayo lubaluleke kakhulu ekukhetheni isakhelo esifanelekileyo kunye nokulungelelanisa.Kufuneka kunikwe ingqwalasela eyodwa kwezi ngongoma zilandelayo:
Uzinzo lwesakhelo lulungile, ngokuhambelana nobume bobuso bomthengi, ngokuqhelekileyo akufuneki ukuba akhethe i-deformation elula yesakhelo esingenasiphako, ukuqinisekisa ukuba i-curvature yangaphambili yesakhelo kunye ne-curvature yebunzi lomntu oyinxibileyo iyahambelana.
Isakhelo kufuneka sibe nokuphakama okwaneleyo okuthe nkqo, ekufuneka kukhethwe ngokohlobo lwelensi ekhethiweyo.Ngaphandle koko, kulula ukusika indawo ekufutshane yembono xa usika umda:
Ummandla ophakathi wempumlo ye-lens uya kukwanela ukulungiselela indawo ye-gradient;Isakhelo seRay-ban kunye nezinye iifreyimu ezinokuthambekela okukhulu emazantsi empumlo ekufutshane nentsimi yombono incinci kunesakhelo esiqhelekileyo, ngoko ayifanelekanga kwisibuko esincinci.
Umgama wamehlo we-lens yesakhelo (umgama phakathi kwe-vertex yangasemva ye-lens kunye ne-vertex yangaphambili ye-cornea, ebizwa ngokuba ngumgama we-vertex) kufuneka ube yincinci ngokusemandleni ngaphandle kokuchukumisa i-eyelashes.
Lungisa i-Angle yangaphambili yesakhelo ngokweempawu zobuso bomntu onxibileyo (emva kokuba isakhelo sifakwe, i-Angle yokuhlangana phakathi kwendiza kunye nenqwelomoya ethe nkqo yeringi yesibuko ngokuqhelekileyo i-10-15 degrees, ukuba idigri inkulu kakhulu; i-engile yangaphambili inokulungelelaniswa ukuba ibe nkulu), ukuze itshatise isakhelo nobuso kangangoko, ukunceda ukugcina ibala lokubonwa ngokuthe ngcembe.
Ixesha lokuposa: Dec-05-2022