Ha u khetha lense, ho tla ba le 1.56, 1.61, 1.67, 1.74 le litekanyetso tse ling tseo u ka li khethang, boleng bona bo bua ka index ea refractive ea lense.
Ha lense e le holimo, lense e ba tšesaane, 'me lense e ba thata le ho feta.Ha e le hantle, ha index ea refractive e phahame, e ntlafatsa boleng ba eona, 'me lense e theko e boima haholo.Haeba u batla ho bapisa lilense tse tšesaane haholo, eseng feela ka index ea refractive, empa hape le boholo ba foreimi le sebaka sa morutoana.
Joale taba ke hore, u khetha index ea refractive ea lense joang?
Batho ba bangata ba nang le likhalase ke feela botenya ba lense, ba tšesaane ba molemo, ba tla khetha ka ho toba lense e nang le index e phahameng ea refractive.Empa ha e le hantle, index ea refractive ha e phahametse ho feta, ho latela likhalase tsa motho ka mong ho khetha se nepahetseng.
Hobaneng ha index e phahameng ea refractive e se betere?
Ntlha ea pele, ntho e 'ngoe le e' ngoe e loketse, eseng e theko e boima haholo e phahameng ke e molemo.
Ea bobeli, ha index ea refractive e phahame, palo ea Abbe e tlase.Ha palo ea Abbe e phahame, setšoantšo se hlakile haholoanyane.Ha palo ea Abbe e le tlase, setšoantšo se hlakile haholoanyane.
Ka hona, hangata ho khothaletsoa ho khetha index ea refractive e nepahetseng ho latela li-degree tsa bona.
Ka kakaretso.
Keletso:
0 ° -400 ° myopia kapa <200 ° -400 ° hyperopia: 1.56;
400 ° -600 ° myopia kapa 400 ° -600 ° hyperopia: khetha 1.61;
600 ° -800 ° myopia: 1,67;
Ka holimo ho 800 ° khetha lense ea khalase kapa lense ea resin ea 1.74.
Ke tšepa hore motho e mong le e mong o phetse hantle ka mahlo, ho hlokomela moea oa fensetere!!!Ke tla u bona bekeng e tlang
Nako ea poso: Aug-12-2022