Xa ukhetha iiglasi zokukhusela amehlo akho, le miba ilandelayo kufuneka iqwalaselwe:

1. Ukhuseleko lwe-UV

• UV400 ileyibhile: Khangela iiglasi zelanga ezibhalwe "UV400". Oku kubonisa ukuba iilensi zinokuvala i-99% okanye ngaphezulu yemitha ye-ultraviolet ngamaza amaza ukuya kuma-nanometers angama-400, kuquka i-UVA (315 - 400 nm) kunye ne-UVB (280 - 315 nm). Imitha ye-ultraviolet inokubangela umonakalo emehlweni, njenge-cataracts, i-photokeratitis, kunye nomonakalo kwi-conjunctiva kunye ne-cornea. Iiglasi zelanga ngaphandle kokhuseleko olwaneleyo lwe-UV zinokubangela ukuba abafundi banwebe phantsi kweelensi ezinemibala emnyama, zivumela imitha ye-UV ukuba ingene emehlweni, okonyusa umngcipheko womonakalo.
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2. Ukufunxa ukukhanya okubonakalayo

• Ukuhanjiswa kokukhanya okufanelekileyo: Imisebenzi eyahlukeneyo ifuna amanqanaba ahlukeneyo okuhanjiswa kokukhanya okubonakalayo. Ukusetyenziswa ngokubanzi kwangaphandle, iilensi ezinokuhanjiswa kokukhanya kwe-15% - 40% zifanelekile. Umzekelo, ukuba uqhuba, iilensi ezinokuhanjiswa malunga ne-18% - 32% zifanelekile njengoko zinokunciphisa ngempumelelo ilitha ngelixa zikuvumela ukuba ubone ngokucacileyo iimpawu zendlela, iimeko zendlela kunye nezinye iinkcukacha. Iilensi ezimnyama kakhulu zinokunciphisa ukubonakala, ngakumbi kwiimeko zokukhanya okuphantsi okanye ebusuku, nto leyo eyingozi kakhulu.
• Umbala weelensi:
  • Iilensi ezingwevu: Iilensi ezingwevu zifunxa ukukhanya okubonakalayo ngokulinganayo kwi-spectrum. Bagcina imbonakalo yemibala yendalo, ibenza bafanelekele imisebenzi eyahlukeneyo, ngakumbi ukuqhuba, njengoko bemele ngokuchanekileyo imibala, eyona nto ibalulekileyo ekwahluleni imiqondiso yendlela.
  • Iilensi eziBrown: Iilensi eziBrown azithinteli kuphela inani elibalulekileyo lokukhanya okuluhlaza okwesibhakabhaka kodwa zibonelela ngombono wombala olungileyo. Ziyaphucula umahluko, zizenza zibe ntle kwimisebenzi efana nokuloba, njengoko zinokunceda ukwahlula phakathi komphezulu wamanzi kunye nezinto ezingaphantsi kwamanzi.
  • Iilensi ezityheli: Iilensi ezityheli zigqwesile ekwandiseni umahluko kwiimeko ezisezantsi zokukhanya okanye ezinomsi. Zihlala zisetyenziselwa ukutyibiliza okanye ukudubula, njengoko zinokwenza izinto zibonakale ngokucacileyo kwimvelaphi. Nangona kunjalo, azikufanelanga ukukhanya kwelanga okuqaqambileyo njengoko zingathinteli ukukhanya okwaneleyo okubonakalayo.

3. Ipolarization

• Nciphisa ilitha: Iindondo zelanga ezipholileyo zisebenza kakhulu ekwehliseni ilitha elibonakala kwindawo ethe tyaba efana namanzi, ikhephu, kunye neehood zemoto. Ukukhazimla kunokubangela ukungonwabi kwaye kunciphise ukucaca okubonakalayo. Xa ukukhanya kubonakalisa le miphezulu, iba yipolarized ngokuthe tye. Iilensi ezipholileyo zinezihluzo ezikhethekileyo ezithintela oku kukhanya okuthe tye, oko kunciphisa ilitha. Oku kuluncedo kakhulu kwimisebenzi efana nokuhamba ngesikhephe, ukuloba, kunye nokuqhuba, njengoko kuphucula ukubonakala kwaye kunciphisa ubunzima bamehlo.

4. Umgangatho welensi

• Ukucaca kwamehlo: Iilensi ezikumgangatho ophezulu kufuneka zibe nokucaca okubalaseleyo. Khangela nakuphi na ukugqwetheka, ukufiphala, okanye ukujija ngokujonga kwiilensi kumgca othe ngqo, njengasekupheleni kocango okanye ifreyimu yefestile. Hambisa iindondo xa ujonge emgceni; ukuba umgca ubonakala ugoba okanye ushukuma, umgangatho we-lens umpofu.
• Scratch - ukumelana: Ekubeni iiglasi zelanga zihlala zisetyenziswa ngaphandle, iilensi zithande ukukrweleka. Iilensi ezine-scratch-resistant coating inokugcina ukucaca kunye nokuqina kwazo ngokuhamba kwexesha. Iilensi zeplastiki ezigqunywe ngokuqina okanye iilensi zeglasi zinokrweleka ngakumbi - azikwazi ukumelana neelensi zeplastiki eziqhelekileyo.
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5. Isakhelo sifanelekile

• Intuthuzelo: Isakhelo kufuneka silingane kakuhle ebusweni bakho ngaphandle kokubangela amanqaku oxinzelelo empumlweni okanye ezindlebeni. Zama kwiifreyimu ezahlukeneyo ukufumana ubungakanani obufanelekileyo kunye nokumila kobuso bakho. Iitempile kufuneka zihlale ngokukhawuleza kodwa zingaqini kakhulu emacaleni entloko yakho, kunye neempumlo zempumlo kufuneka zixhase ubunzima beeglasi ngokulinganayo ekhaleni.
• Ukhuseleko: Isakhelo kufuneka sinikeze ukhuseleko olwaneleyo lokukhusela amehlo akho ekukhanyeni kwelanga okuvela emacaleni. Iifreyimu ezisongayo zilukhetho olulungileyo njengoko zinokuvala ukukhanya okungaphezulu komda, ukunciphisa umthamo wemitha ye-UV kunye nemitha efikelela emehlweni akho ukusuka emacaleni.