Isayensi edumile yezinhlobo zezibuko ezikhona emakethe njengamanje

Izibuko zokufunda:
Indlela esebenza ngayo: Asetshenziselwa ukulungisa i-presbyopia, amalensi ezingilazi zokufunda amalensi ayi-convex asiza amehlo ukuthi agxile.
Uhlobo: Izibuko zokufunda okugxilwe kuzodwa, zingabona eduze kuphela; Kunezibuko zokufunda ze-bifocal noma ezigxile ezintweni eziningi, ezingahlangabezana nezidingo zokubona kude nokuvala ngesikhathi esisodwa.

Izibuko zelanga:
Umsebenzi: Isetshenziswa kakhulu ukuvimba ukukhanya kwelanga nemisebe ye-ultraviolet ukunciphisa ukugqugquzelwa nokulimala kokukhanya kwelanga emehlweni.
Umbala welensi: Imibala eyahlukene yamalensi ifanele izindawo ezihlukene nemisebenzi. Isibonelo, ama-lens ampunga ahlinzeka ngombono wombala wemvelo futhi afanele izimo ezihlukahlukene zokukhanya; Amalensi ansundu akhulisa ukugqama kombala kuyilapho enciphisa ukuxhopha, afanele ukushayela nezinye izigcawu; Amalensi aphuzi athuthukisa umehluko, umphumela obonakalayo ungcono ekukhanyeni okuphansi noma ezimweni ezinamafu, ngokuvamile asetshenziselwa ukushushuluza, ukudoba kanye neminye imidlalo.

Izibuko ezishintsha umbala:
Isimiso: I-lens iqukethe izinto ezikhethekile zamakhemikhali (njenge-silver halide, njll.), ku-ultraviolet noma ukukhanya okunamandla kwe-irradiation kuzokwenzeka ukusabela kwamakhemikhali, ukwenza umbala we-lens ube mnyama; Lapho ukukhanya kuncishisiwe, ukusabela kuyahlehliswa, futhi umbala welensi kancane kancane uba lula futhi ubonakale.
Izinzuzo: Ipheya lezibuko lingahlangabezana nezidingo zokusetshenziswa kwangaphakathi nangaphandle ngesikhathi esifanayo, ezikahle futhi ezisheshayo, zigwema inkinga yokushintshwa njalo kwezibuko.