Kuze kube manje, amalensi oxhumana nabo akuyona nje ithuluzi elibalulekile lokulungisa ukukhubazeka kombono (ukusondelana, i- astigmatism ), kodwa futhi ikuvumela ukuthi ushintshe isithombe sakho, uthole umbala weso oyifunayo.
Ama-lens oxhumana nabo obuhlaza okwesibhakabhaka onamehlo aluhlaza
Shintsha umbala wamehlo okukhanya ngamalensi oxhumana nabo kulula, kodwa ukushintsha umbala obomvu ube luhlaza. Amalensi ashintsha umbala wamehlo ahlukaniswe abe umbala nezwi:
Ama-lens aqoshiwe akuvumela ukuthi ushintshe umbala wamahlo kuphela alula kakhulu, futhi ngokuvamile aklanyelwe ukwenza kube lula futhi agcwaliswe. Uma ufaka ama-lense aluhlaza okwesibhakabhaka emehlweni akho aluhlaza, umbala wabo uzoshintsha kancane, futhi umthunzi ongavamile ungabonakala.
Ama-lens ombala akuvumela ukuthi ushintshe umbala wamehlo kusuka kusibhakabhaka kuya ku-blue hue oyifunayo. Ama-lensi anjalo agcwele kangangokuthi afihla ngokuphelele umbala weqiniso wamehlo.
Ama-lens aluhlaza abukeka kanjani amehlo asundu?
Ukuze kufinyeleleke ukuthi ama-lens aluhlaza ngokwemvelo ayibheka amehlo aluhlaza, kunzima kakhulu:
- Ebumnyama amehlo, umthunzi we-lens udinga kakhulu ukumboza umbala wangempela.
- Ububanzi be-lens kufanele bufanise ububanzi be-iris noma buyifake, kungenjalo umhlanga obumnyama uzobonakala kusuka ngaphandle.
- Njengoba ama-lens ezinemibala aseduze ne-opaque (ngaphandle kwendawo yomfundi), azifihla ngokuphelele iris, ngakho nje ama-lens aluhlaza okwesibhakabhaka onamehlo aluhlaza abukeka engokwemvelo. Ukugqoka kuyinto efiselekayo ukukhetha amalensi ngephethini evumelana nephethini yemvelo ye-iris. Ama-lensi anjalo ayabiza kakhulu, kodwa abukeka eningi kakhulu.
- Njengoba umfundi wesintu ekhula futhi enkontileka, kuye ngokukhanyisa, ngokukhanya okukhanyayo okuzungeze umfundi, ibhontshisi ensundu ibonakala. Ngokukhanya okuncane, ama-lens aluhlaza okwesibhakabhaka onamehlo aluhlaza cishe angabonakali.
Izici zokukhetha nokugqoka ama-lens ezinemibala
Amalensi, ngisho nangaphandle kokudideka, kuyadingeka ukuthenga kuma-optics nakubakhiqizi abaziwayo:
- I-FreshLook Colorblends;
- I-Bausch ne-Lomb;
- I-Аcuvue imibala emibili.
Nakuba ama-lensi ezinamanje anemibala encane ngokwanele, asadlula kakhulu i-oxygen, engabangela ukuzwa okungathandeki. Ngakho-ke, uma ugqoke ama-lens nawe kunconywa ukuthi ube namaconsi akhethekile - "izinyembezi zokufakelwa" - futhi ama-lensi ngokwabo ayathandeki ukugqoka isikhathi eside.
Faka isicelo sokwenza izimonyo ngokufanele ngemuva kokuthi ama-lens agqoke: lokhu kuzogwema ukungena ehlokweni lazinhlayiya zawo, futhi wenze ngokuvumelana nombala wamehlo.
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