Xa ukhetha i-lens, kuya kubakho i-1.56, i-1.61, i-1.67, i-1.74 kunye namanye amaxabiso okukhetha, eli xabiso libhekisela kwisalathiso se-refractive ye-lens.
Ukuphakama kwesalathiso se-refractive ye-lens, i-lens encinci kwaye i-lens inzima.Ngokuqinisekileyo, i-index ye-refractive ephezulu, ingcono umgangatho, kwaye i-lens ibiza kakhulu.Ukuba ufuna ukufanisa iilensi ezincinci kakhulu, kungekhona nje ngesalathisi sokuqhafaza, kodwa kunye nobukhulu besakhelo kunye nomgama womfundi.
Ke inqaku kukuba, ukhetha njani isalathiso se-refractive yelensi?
Abantu abaninzi abaneeglasi kuphela ubukhulu be-lens, obuncinci bungcono, baya kukhetha ngokuthe ngqo i-lens kunye ne-high refractive index.Kodwa eneneni, isalathiso se-refractive asiyiyo ephezulu ngcono, ngokweeglasi zomntu ukukhetha okulungileyo.
Kutheni i-refractive index ingekho ngcono?
Okokuqala, yonke into ifanelekile, kungekhona ukuba ixabiso elibi kakhulu liphezulu.
Okwesibini, i-index ye-refractive ephezulu, iphantsi kwenombolo ye-Abbe.Okukhona inani lika-Abbe liphezulu, kokukhona umfanekiso ucace ngakumbi.Okukhona kusezantsi inani le-Abbe, kokukhona umfanekiso ucace ngakumbi.
Ngoko ke, ngokuqhelekileyo kucetyiswa ukuba ukhethe isalathisi esifanelekileyo se-refractive ngokwezidanga zabo.
Nje.
Ingcebiso:
0 ° -400 ° myopia okanye <200 ° -400 ° hyperopia: 1.56;
400 ° -600 ° myopia okanye 400 ° -600 ° hyperopia: khetha 1.61;
600 ° -800 ° myopia: 1.67;
Ngaphezulu kwe-800 ° khetha ilensi yeglasi okanye i-1.74 resin lens.
Ndiyathemba ukuba wonke umntu usempilweni enamehlo, ukukhathalela ngakumbi umphefumlo wefestile!!!Ndiza kubona kwiveki ezayo
Ixesha lokuposa: Aug-12-2022