Inkqubo yokufakelwa kwe-multifocal eqhubekayo
1. Xoxa kwaye uqonde iimfuno zakho zokubona, kwaye ubuze ngembali yakho yeeglasi, umsebenzi, kunye neemfuno zeeglasi ezintsha.
2. I-computer optometry kunye nomlinganiselo womgama phakathi kwabafundi abaneliso elinye.
3. Uvavanyo lombono we-spectacle ongenanto/owokuqala, xa kugqitywa nge-diopter yomgama, kufuneka lusekelwe kwi-diopter yeeglasi zokuqala kunye neemfuno zokubona umgama.
4. Umgaqo we-retinoscopy kunye ne-subjective refraction (umbono womgama) wokumisela i-diopter yomgama ngulo: ngokusekelwe kumgaqo wombono womgama owamkelekileyo, i-myopia inokuba nzulu kangangoko kunokwenzeka, i-hyperopia inokwanela kangangoko kunokwenzeka, kwaye kongezwa i-astigmatism. Lumka kwaye ugcine amehlo akho elungelelene.
5. Ukuze ulungise umbono womgama, lungisa kwaye uqinisekise ilensi nge-distance distance distance distance distance distance different foreheads yomntu ojongwayo, kwaye uvumele umntu ojongwayo ayinxibe ukuze abone ukuba i-distance distance distance distance distance different iyamkeleka na.
6. Umlinganiselo we-Near-presbyopia/presbyopia.
7. Zama ukulungisa umbono okufutshane, lungisa kwaye uqinisekise.
8. Intshayelelo kunye nokukhethwa kweentlobo kunye nezixhobo zeelensi eziqhubekekayo.
9. Kucetyiswa ukuba ukhethe ifreyimu. Khetha ifreyimu ehambelanayo ngokweemfuno ezahlukeneyoiilensi eziqhubekekayoukhetha, kwaye uqinisekise ukuba kukho umgama owaneleyo othe nkqo ukusuka embindini wempundu ukuya kwindawo ephantsi yomphetho ongezantsi wesakhelo.
10. Ukubumba ifreyimu, umgama phakathi kweeglasi zamehlo yi-12 ~ 14mm. I-engile yokuthambekela phambili yi-10 ° ~ 12 °.
11. Umlinganiselo wokuphakama komfundi weliso elinye.
12. Ukumiselwa kweeparamitha zokulinganisa ifilimu eqhubekekayo.
13. Isikhokelo sokusetyenziswa kweelensi eziqhubekekayo. Kukho iimpawu kwiilensi. Jonga ukuba ii-crosshair ziphakathi kwe-pupil kwaye umisele ukusetyenziswa kwayo yonke imigama.
Ukukhethwa kwesakhelo se-multifocal esiqhubekekayo
Xa kukhethwa iifreyimu, kufuneka kuqala ukuba indawo ephakathi yomfundi ukuya kumda ongaphakathi wefreyimu esezantsi yefreyimu ngokubanzi ingabi ngaphantsi kwe-22mm. Ukuphakama kwefreyimu eqhelekileyo ye-18mm okanye i-19mm kufuneka ibe yi-≥34mm, kwaye ubude befreyimu emfutshane ye-13.5 okanye i-14mm kufuneka ibe yi-≥ 30mm, kwaye uphephe ukukhetha iifreyimu ezine-bevel enkulu ecaleni kwempumlo, kuba kulula "ukunqumla" indawo yokufunda. Zama ukungakhethi iifreyimu ezingenafreyimu, ezilula ukuzikhulula nokutshintsha iiparameter ezahlukeneyo. Kwakhona qiniseka ukuba ukhetha iifreyimu ezinee-nose pads ezihlengahlengiswayo.
Ukumakishwa okuqhubekekayo kwezinto ezininzi ezijolise kuzo
Ngaphambi kokulinganisa, ifreyimu kufuneka ilungiswe kwaye ilinganiswe ukuze kufunyanwe ibhalansi engcono. Umgama phakathi kweeglasi zamehlo ngokubanzi yi-12-13mm, i-engile yangaphambili yi-10-12 degrees, kwaye ubude beetempile bufanelekile.
1. Umvavanyi kunye nomntu ohlolwayo bahlala bejongene kwaye bagcina amehlo abo ekwinqanaba elifanayo.
2. Umvavanyi uphethe ipeni yokuphawula ngesandla sakhe sasekunene, uvala iliso lakhe lasekunene, avule iliso lakhe lasekhohlo, abambe ithotshi efana nepeni esandleni sakhe sasekhohlo aze ayibeke phantsi kweliso elisezantsi leliso lasekhohlo, aze acele umvavanyi ukuba ajonge iliso lasekhohlo lomvavanyi. Phawula umgama phakathi kwabantwana ngemigca enqamlezileyo kwisampulu yeeglasi ngokusekelwe kumboniso ovela embindini womfundi wesifundo. Umgama othe nkqo ukusuka kwindawo apho imigca enqamlezileyo idibana khona nomphetho ongezantsi wangaphakathi wesakhelo bubude bomfundi weliso lasekunene lomfundi.
3. Umvavanyi ubambe uphawu esandleni sakhe sasekunene, uvala iliso lakhe lasekhohlo, avule iliso lakhe lasekunene, abambe isibane sepen kwisandla sakhe sasekhohlo aze asibeke phantsi kweliso elisezantsi leliso lakhe lasekunene, ecela umvavanyi ukuba ajonge iliso lasekunene lomvavanyi. Phawula umgama phakathi kwabantwana ngemigca enqamlezileyo kwisampulu yeeglasi ngokusekelwe kukukhanya okuvela embindini womfundi wesifundo. Umgama othe nkqo ukusuka kwindawo apho imigca enqamlezileyo idibana khona nomphetho ongezantsi wangaphakathi wesakhelo bubude bomfundi weliso lasekhohlo lomfundi.
Wisiko ukuya ekupheleni
Iilensi ze-multifocal eziqhubekekayoZibiza kakhulu ukuzenza kwaye ziilensi ezisebenzayo. Zenzelwe abantu abangakwaziyo ukuzilungisa ngokwaneleyo. Abakwazi ukubona ngokucacileyo xa bekufutshane (umgama wokufunda ongama-30 cm), nokuba ngamehlo angenanto okanye benxibe iiglasi, okanye abakwazi ukubona ngokucacileyo xa bekufutshane xa bebona. , kufuneka unxibe iiglasi ngexesha okanye kufuneka utshintshe iiglasi. Kufuneka kuqatshelwe apha ukuba umgaqo wokunxiba iiglasi ze-presbyopia yeyona ndlela ilungileyo yokubona kunye nenqanaba eliphezulu, ukuqinisekisa izinto ezicacileyo kunye nokunciphisa umthwalo wokudinwa kwamehlo okubangelwa kukubona okukufutshane kangangoko kunokwenzeka.
Ixesha lokuthumela: Disemba-08-2023