I-Single Vision Lens VS.I-Bifocal VS.Okuqhubekayo
amalensi ombono owodwa anikeza ukulungiswa okukodwa kokubona.Lokhu kusho ukuthi basabalalisa ukugxila ngokulinganayo phezu kwayo yonke ilensi, esikhundleni sokuhlukanisa ukugxila phakathi kwengxenye engaphezulu nephansi, njengoba kwenzeka ngama-bifocals.Izibuko zokubona okukodwa ziwuhlobo oluvame kakhulu lwencwadi kadokotela, futhi zingalungisa ukubona eduze (i-myopia) noma ukubona kude (hyperopia).Uma udokotela wakho engakayichazi incwadi kadokotela ekhetheke kakhulu, kungenzeka ukuthi uzodinga izibuko zokubona okukodwa.Kunezizathu eziningi zokuthi ungase udinge incwadi kadokotela yombono owodwa.Abanye abathengi basebenzisa amalensi okubona okukodwa ezingilazini zabo zokufunda, okuvumela isithombe esicacile nesicacile sisondele.Abanye bayazuza ekucaceni okuphezulu ebangeni, isibonelo, lapho besebenzisa izibuko zokubona okukodwa lapho ushayela.
Ama-Bifocal asiza lawo adinga ukulungiswa kokubona kwe-myopia (ukubona kancane) kanye ne-presbyopia (ukubona isikhathi eside).Amalensi avumela ukubona okucacile kunoma yiliphi ibanga phakathi kwepheya elilodwa lezibuko.
Angacatshangwa njengamalensi kadokotela ajwayelekile anengxenye yokufunda eyengeziwe.Ingxenye yokufunda imvamisa ibekwe ngasengxenyeni engezansi yelensi
D Seg Bifocals
Indawo yokufunda ye-D Seg Bifocal ibukeka njengohlamvu D olubekwe eceleni kwayo.Angase abizwe ngokuthi yi-Flat Top Bifocal.I-D Seg idizayini ye-Bifocal elula ukuze umuntu oyigqokile azivumelanise nayo.Ngenxa yalokhu, iwuhlobo oludume kakhulu emakethe namuhla.
Ingxenye yokufunda itholakala ngezinhlobo ezahlukene.Amalensi asetshenziswa kakhulu yi-D 28 kanye no-D 35. Ingxenye ye-D 28 ingu-28mm ububanzi bese i-D 35 ingu-35mm ububanzi.
D Seg Bifocals
Indawo yokufunda ye-D Seg Bifocal ibukeka njengohlamvu D olubekwe eceleni kwayo.Angase abizwe ngokuthi yi-Flat Top Bifocal.I-D Seg idizayini ye-Bifocal elula ukuze umuntu oyigqokile azivumelanise nayo.Ngenxa yalokhu, iwuhlobo oludume kakhulu emakethe namuhla.
Ingxenye yokufunda itholakala ngezinhlobo ezahlukene.Amalensi asetshenziswa kakhulu yi-D 28 kanye no-D 35. Ingxenye ye-D 28 ingu-28mm ububanzi bese i-D 35 ingu-35mm ububanzi.
Ama-bifocals ahlanganisiwe
Nakuba ama-bifocal amaningi anemigqa ebonakalayo emngceleni wamasegimenti amalensi, kukhona i-bifocal ye-round-seg ehlanganisiwe enesegimenti eseduze ephawuleka kancane kunomzala wayo ovamile we-round-seg.
Isegi eseduze ihlanganiswa engxenyeni yebanga yelensi ukuze ingabonakali.
Njengoba ingekho imigqa ebonakalayo, i-bifocal eyindilinga eyindilinga ehlanganisiwe inikeza ukubukeka kobusha kunama-bifocal anemigqa.
Amalensi aqhubekayo anemiyalelo emithathu kupheya eyodwa yezibuko.Lokho kukuvumela ukuthi wenze umsebenzi oseduze (njengokufunda incwadi), umsebenzi webanga eliphakathi (njengokuhlola iwebhusayithi kukhompuyutha), noma ukubuka ibanga (njengokushayela) ngaphandle kokudinga ukushintsha izibuko zakho.Ngezinye izikhathi abizwa ngokuthi ama-multifocal lens.
Amalensi aqhubekayo ayisibuyekezo samalensi e-bifocal kanye ne-trifocal.Zombili lezi zinhlobo zezingilazi zendabuko zinemigqa ecacile kumalensi.I-Progressives inokubukeka okungenamthungo.Ngezinye izikhathi zibizwa ngokuthi "ama-no-line bifocals," kodwa lokho akulungile.Kungaba nembe kakhulu ukubiza amalensi aqhubekayo ngokuthi "no-line trifocals."
Ngamalensi aqhubekayo, ngeke udinge ukuba nezibuko ezingaphezu kweyodwa nawe.Awudingi ukushintsha phakathi kokufunda kwakho kanye nezibuko ezijwayelekile.
Umbono onokuthuthuka ungabonakala ungokwemvelo.Uma ushintsha ekubukeni okuthile eduze kokuthile okude, ngeke uthole "ukweqa" njengoba ubungenza ngama-bifocals noma ama-trifocals.Ngakho uma ushayela, ungabheka kudeshibhodi yakho, emgwaqeni, noma uphawu olukude olunoshintsho olubushelelezi.
Isikhathi sokuthumela: Apr-08-2022