Lapho ukhetha i-lens, kuzoba no-1.56, 1.61, 1.67, 1.74 namanye amanani ongawakhetha, leli nani libhekisela kunkomba ye-refractive yelensi.
Uma iphezulu inkomba ye-refractive ye-lens, i-lens iba mncane futhi i-lens iba nzima nakakhulu.Yiqiniso, ukuphakama kwe-refractive index, ikhwalithi engcono kakhulu, futhi i-lens ibiza kakhulu.Uma ufuna ukufanisa ama-lens amancane kakhulu, hhayi kuphela ngenkomba ye-refractive, kodwa futhi nosayizi wefreyimu kanye nebanga lomfundi.
Ngakho-ke iphuzu liwukuthi, ungayikhetha kanjani inkomba ye-refractive yelensi?
Abantu abaningi abanezibuko bawubukhulu be-lens kuphela, abancane kakhulu, bazokhetha ngokuqondile i-lens ene-high refractive index.Kodwa empeleni, inkomba refractive akuyona ephakeme kangcono, ngokusho izibuko zomuntu siqu ukukhetha ilungelo.
Kungani ukuphakama kwe-refractive index kungengcono?
Okokuqala, yonke into ifanelekile, hhayi ukuthi ibiza kakhulu ephakeme iyona engcono.
Okwesibili, ukuphakama kwenkomba ye-refractive, iyancipha inombolo ye-Abbe.Uma inombolo ye-Abbe iphezulu, isithombe sicaca nakakhulu.Uma inombolo ye-Abbe iphansi, isithombe siyacaca.
Ngakho-ke, ngokuvamile kunconywa ukukhetha inkomba efanele ye-refractive ngokusho kweziqu zabo.
Ngenjwayelo.
Iseluleko:
0 ° -400 ° myopia noma < 200 ° -400 ° hyperopia: 1.56;
400 ° -600 ° myopia noma 400 ° -600 ° hyperopia: khetha 1.61;
600 ° -800 ° myopia: 1.67;
Ngaphezulu kuka-800° khetha ilensi yengilazi noma ilensi ye-resin engu-1.74.
Ngethemba wonke umuntu onempilo enamehlo, ukunakekelwa okwengeziwe komphefumulo wefasitela!!!Sobonana ngesonto elizayo
Isikhathi sokuthumela: Aug-12-2022