Abaningi abagqoka izibuko bahlangabezana nobunzima obune ngesikhathi sokushayela:
--ukubona okufiphele lapho ubheka eceleni ngelensi
--ukubona kabi ngenkathi ushayela, ikakhulukazi ebusuku noma elangeni elicwebezelayo
--izibani zezimoto ezivela phambili. Uma lina, ukucabanga emgwaqeni kuyakuqinisa lokhu
--ukulinganisa amabanga, isb uma udlula noma upaka
Kafushane, ilensi yokushayela kufanele ifake izici ezi-4 zokuxazulula izinkinga ezingenhla.
--Inkundla yombono engavinjelwe
--Lincane (ilanga) elicwebezelayo futhi lihluke kakhulu
--Umbono omuhle kakhulu wasebusuku
--Ukuhlolwa okuphephile kwamabanga
Isixazululo selensi yokushayela yangaphambilini sigxile kakhulu ekuxazululeni ukukhanya okukhazimulayo ngokugqama kakhulu ngamalensi anombala ogqamile noma amalensi agqamile, kodwa asizange sinikeze izixazululo kwezinye izici ezintathu.
Kodwa manje ngobuchwepheshe bamanje be-freeform, ezinye izinkinga ezintathu nazo zixazululwa kahle.
Ilensi ye-Eyedrive freeform progressive lens ithuthukiswa ukuze ivumelane nemisebenzi enezidingo eziqondile zokubona, indawo yedeshibhodi, izibuko zangaphandle nezangaphakathi kanye nebanga eliqinile lokugxuma phakathi komgwaqo nangaphakathi emotweni. Ukusatshalaliswa kwamandla kucatshangelwe ngokukhethekile ukuze kuvunyelwe abawagqokile ukushayela ngaphandle kokunyakazisa ikhanda, izibuko zangemuva ezingemuva ezitholakala ngaphakathi kwendawo ekhululekile ye-astigmatism, kanye nokubona okuguquguqukayo nakho kuye kwathuthukiswa kunciphisa ama-astig-massism lobes abe amancane.
Iphinde ithuthukise ulwazi olubonakalayo lomuntu ogqokile lapho eshayela ezimeni zasemini nasebusuku. Inxephezela imiphumela ye-myopia yasebusuku ngendawo ehlukile ukuze inikeze ukugxila okungcono. Ukubona okulungiselelwe ukuze uthole umbono ongcono wedeshibhodi, izibuko zangaphakathi, nezangaphandle. Yehlisa izimpawu zokukhathala okubukwayo lapho ushayela ebusuku. Ikhono lokubona elikhudlwana lokugxila kalula kanye nokunyakaza kwamehlo okushesha kakhudlwana. Sekuseduze nokuqedwa kokufiphala kwe-peripheral.
♦ Ukubona kangcono ekukhanyeni okuphansi kanye nezimo zezulu ezimbi
♦ Yehlisa ukukhanya okubonakalayo ebusuku ezimotweni ezizayo noma amalambu asemgwaqweni
♦ Ukubona kahle umgwaqo, ideshibhodi, isibuko esingemuva kanye nezibuko ezisemaceleni
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