Amalensi wokuxhumana, ongakhetha kanjani?

Izici eziningana zikhomba ukuthi yiziphi i-lensi ezifanele kakhulu kuwe: ukucacisa kwesifo; imvamisa yokugqoka ama-lens, ocabanga ukuthi; ukunakekelwa okufanele kubo.

Amalensi wokuxhumana ukuthi ungakhetha kanjani indlela efanele?

Kunezinhlobo ezinhlanu zama-lens okuxhumana:

Ama-lensi amancane. Le nguqulo ye-lens ifaneleka kakhulu kubantu abane-cornea ne-astigmatism engalingani. Ama-lens anjalo aklanyelwe ukusetshenziswa kwesikhathi eside, kodwa abe nezinselele zabo. Impendulo yokuqala yukuthi ngenkathi usujwayele futhi ungathola induduzo, kuzothatha amasonto ambalwa. Okungesibili kwesibili ukuthi i-oksijini cishe ayifaneleki, ngakho kufanele igqoke amahora angaba ngu-20.

Ama-lense aqinile , kodwa i-oksijeni ingena ngamehlo ngokukhululekile. Kubonakala ngokuthuthukisiwe umbono ngenxa yalokhu (nakuba isebenza kuze kube yiminyaka engu-5) kanti ngenkathi njengama-lens athambile akhululekile.

Amalensi amancane kakhulu adlula oksijini. Ngenxa yokuqukethwe kwamanzi aphezulu ema-lens othintana nabo abathandekayo, abantu abaningi bavumelane kusuka cishe ezinsukwini zokuqala zokugqoka. Ama-lens anjalo aqondisa i-hyperopia ne-myopia, kodwa i-astigmatism ayilungisi.

Amalensi othintana amancane afakwe ukugqoka isikhathi eside. Ngenxa yezinga eliphezulu kakhulu lokuqukethwe kwamanzi kulawo malense, angasuswa ngaphandle kokugqoka kuze kube yinyanga. Kodwa, ngeshwa, ukwandisa ingozi yokutheleleka, ngoba i-lens engcolisiwe ihlala isikhathi eside esweni.

Ama-lens amancane afakwe ukusetshenziselwa isikhathi esifushane. Loluhlobo lwama-lens ashisayo lukhethekile, okuyinto onke amaviki amabili kuya kwangu-4 ashintshela. Ama-lens anjalo ayaziwa kakhulu kamuva nje. Ukuhlanzwa ngendlela efanayo nama-lens ajwayelekile.

Intuthuko yakamuva kwezobuchwepheshe bokuhlanza nokukhiqiza izinhlobo ezahlukene zamalensi okuxhumana kwenza kube lula ukuyiyisa kubantu abaningi. Kodwa ngisho nama-lens amanje futhi amasha kakhulu axhumene nawo awaxazulula zonke izinkinga ngombono futhi abanye abantu abafanelanga. Lokhu kwenzeka ngenxa yeso elibucayi kakhulu noma izidingo ezikhethekile zomuntu ngamunye.

Ama-oculist amaningi awacebisi izingane ukuthi zisebenzise amalensi othintana nabo, ngoba zingalimaza iso uma zigqoka noma zisusa amalensi. Futhi, ezimweni ezomile noma emoyeni owomile, ungase uzizwe uxhumene namalensi njengesihlabathi "emehlweni." Kungase kube nokuzwa okungathandeki lapho ugula ngubanda, ngoba amehlo akho athela njalo, noma ngokuphambene nalokho, ayomile ngokweqile, ngenxa yezidakamizwa ezithathwe.

Kunezimo ezinjalo ukuthi phakathi nokuya esikhathini kwabesifazane abathile, amalensi enza ukungahambisani phakathi kwesikhathi noma ngesikhathi sokukhulelwa noma ukuthatha imithi yokuvimbela imithi, njengoba ukwakhiwa kwamakhemikhali kushintshela uketshezi lwezinyembezi. Abantu abasebenza endaweni ephethe izidakamizwa zamakhemikhali, uthuli nezinye izimo ezivuthayo ezingena emoyeni ngezinye izikhathi bathola izinhlayiyana ezincane zalezi zinkinga ngaphansi kwama-lens, okubangela ukungakhululeki. Ezimweni ezinjalo, izigqoko kufanele zigqoke.

Izinkinga ezihambisana nokugqoka kwendwangu yocingo zithinteka ngo-4% wabanikazi bazo njalo ngonyaka, futhi zingaphazamisa amehlo 'mucosa, ifilimu yezinyembezi, izingqimba ze-corneas ehlukene, ngisho nejwabu leso. Ucwaningo olwenziwe ososayensi ngemiphumela emibi yokugqoka ama-lens iminyaka engaphezu kwengu-5 lubonise ukuthi abantu abanjalo bangaba nemiphumela enjengokunyuka kwesikhumba se-cornea, ukwehla ekubunjeni kwe-cornea nokuphazanyiswa okungenasisekelo.

Ngaphambi kokuthinta iso lama-contact lens, kufanele ugeze ngokucophelela izandla zakho ngesepha, elingenalo izifo kanye nama-moisturizers.