Abantu abavame ukushintsha isithombe sabo, futhi banake ngisho nemininingwane encane kunazo zonke esithombeni, bavame ukuthola amalensi okuxhumana anombala. Lezi zesekeli ezincane zikuvumela ukuba ugcizelele noma uguqule kakhulu umthunzi wemvelo we-iris, ukunikeza ukubukeka okungenangqondo nokungajwayelekile ngenxa yamaphetheni ahlukahlukene. Ngaphezu kwalokho, la madivaysi angabuye asetshenziselwe ukulungiswa kombono .
Ama-lensi oxhumana nawo ayenziwe kanjani?
Ukuze uthole izesekeli eziphelele, kubalulekile ukutadisha ngokucophelela izici zabo eziyinhloko.
Okokuqala udinga ukunquma izinto zokwenza. Kunamaqembu amabili amakhulu amadivayisi ahlongozwayo - amalensi okuxhumana anemibala enzima futhi enombala. Izidakamizwa ezingaphezu kwezingu-90 zamasheya asetshenzisiwe, zenziwe nge-hydrogel noma i- silicone hydrogel . Izesekeli ezinamandla zenziwe ngama-polymers akhethekile, ziyanconywa kuphela ukulungisa ukuhlukahluka okukhulu kwe-astigmatism ne-keratoconus.
Isigaba esilandelayo sokukhethwa kwe-lens kuhilela ukukhetha umbala wabo nokugcwala. Kunezinhlobo eziningana ezichazwe ngamadivayisi:
- ukuxhuma, ukudlulisa;
- ehlanganisa ithoni yemvelo ye-iris;
- "Crazy" noma imikhosi.
Uhlobo lokuqala lwezesekeli lufanelekile kakhulu emehlweni anokukhanya. Ikuvumela ukuba wenze umthunzi wemvelo we-iris ojulile nokuningi ogcwele, kodwa ungashintshi kakhulu.
Ngamehlo amnyama, ama-lens ombala wombala one-opaque we-pigment anconywa. Banikeza ushintsho kwanoma imuphi umthunzi we-iris kuya ithoni oyifunayo.
Amadivayisi we-Carnival asetshenziselwa ukudala izithombe ku-shoot photo, amaqembu ahlosiwe, imikhosi ethintekayo. Izesekeli ezinjenge "crazy" zihlukaniswa yizinhlobonhlobo ezinkulu zamaphethini ezishaqisayo namathunzi angavamile. Ngosizo lwabo, ungashintsha ngisho nombala we-sclera.
Esinye isici esibalulekile ekukhethweni kwama-lens wokuxhumana kuyimvamisa yeshintsho sabo. Kunezinkathi eziningana eziphakanyisiwe zokuzigqoka:
- usuku;
- 1-2 amasonto;
- inyanga;
- kuze kube izinyanga eziyisithupha;
- Izinyanga ezingu-12 (zendabuko).
Kumele uqaphele ukuthi ngisho namalensi oxhumana nabo abalungisa ukulungiswa akukhuthazwa ukuba asetshenziswe njalo futhi njalo. Ophthalmologists bayelulekwa ukuba bangawagqoka kaningi izikhathi 3-4 ngeviki amahora ambalwa, mhlawumbe emini. Iqiniso liwukuthi kusihlwa futhi ngezinga elincane lokukhanyisa umfundi ukhula, ngokufanele, ingxenye engumbala yensiza ifinyelela emkhakheni wombono, okubonwa ubuchopho njengokuphazanyiswa okubukwayo.
Amalensi oxhumana nabo abanobuciko abashayeli be-diopters
Ngokuvamile, amadivaysi okulungisa akhiqizwa ngesimo somthunzi, njengoba isakhiwo sabo esingahambi kahle sivumela ukuthi sibone ngokucacile kungakhathaliseki izinga lokukhulisa noma ukunciphisa umfundi futhi ngaphandle kokuphazanyiswa.
Ezinye izinhlobonhlobo zama-lens ezinemibala ezinama-diopter azivamile, nakuba nazo ziyadingeka kakhulu. Ochwepheshe abaphakamisi ukusetshenziswa kwezesekeli ze-iris nezigqoko zokugqoka zaleso sakhiwo kaningi nangesikhathi eside. Isikhathi sokugqoka esivunyelwe singamahora angu-2-4, izikhathi ezingu-1-2
Amalensi oxhumana nombala ngaphandle kwama-diopter ngamehlo
Uma zingekho izinkinga zombono, azikho imingcele ekhethekile ngesikhathi sokusetshenziswa kwamalensi wokugubha umkhosi, umbala noma umfundi.
Into eyinhloko ukuthenga izesekeli zekhwalithi ne-gasmeability eyaneleyo nokuqukethwe kwamanzi aphakeme (cishe ngo-70%). Lokhu kunikeza ukufinyelela okukhululekile kwe-oksijeni ku-cornea yeso, kanye nokucwilisa amandla ebusweni be-eye, okuvimbela ukucasuka nobuhlungu phakathi nokugqoka isikhathi eside kwama-contact lens.