Lapho ukhetha izibuko zokuvikela amehlo akho, izici ezilandelayo kufanele zibhekwe:

1. Ukuvikelwa kwe-UV

• Ilebula ye-UV400: Bheka izibuko zelanga ezibhalwe ukuthi "UV400". Lokhu kubonisa ukuthi amalensi angavimba u-99% noma ngaphezulu wemisebe ye-ultraviolet ngamaza afinyelela ku-400 nanometers, okuhlanganisa i-UVA (315 - 400 nm) ne-UVB (280 - 315 nm). Imisebe ye-Ultraviolet ingabangela ukulimala kwamehlo, njenge-cataract, i-photokeratitis, nokulimala kwe-conjunctiva ne-cornea. Izibuko zelanga ezingenazo ukuvikelwa kwe-UV okwanele zingabangela abafundi ukuthi banwebe ngaphansi kwamalensi anombala omnyama, okuvumela imisebe ye-UV eminingi ukuba ingene emehlweni, okwandisa ingozi yokulimala.
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2. Ukumuncwa kokukhanya okubonakalayo

• Ukudlulisa ukukhanya okufanelekile: Imisebenzi ehlukene idinga amazinga ahlukene okudlulisa ukukhanya. Ngokusetshenziswa okuvamile kwangaphandle, ama-lens ane-transmittance yokukhanya ka-15% - 40% afanelekile. Isibonelo, uma ushayela, amalensi anokudlulisa okungaba ngu-18% - 32% alungile njengoba akwazi ukwehlisa ukukhanya okuxhophayo kuyilapho ekuvumela ukuthi ubone ngokucacile izimpawu zomgwaqo, izimo zomgwaqo, neminye imininingwane. Amalensi amnyama kakhulu anganciphisa ukubonakala, ikakhulukazi ezimweni eziphansi - ukukhanya noma ebusuku, okuyingozi kakhulu.
• Umbala wamalensi:
  • Amalensi ampunga: Amalensi ampunga amunca ukukhanya okubonakalayo ngokulinganayo kuyo yonke i-spectrum. Agcina ukubonakala kombala wemvelo, okuwenza afanelekele imisebenzi ehlukahlukene, ikakhulukazi ukushayela, njengoba emela imibala ngokunembile, okubalulekile ekuhlukaniseni amasignali omgwaqo.
  • Amalensi ansundu: Amalensi ansundu awavimbi kuphela inani elibalulekile lokukhanya okwesibhakabhaka kodwa futhi ahlinzeka ngombono omuhle wombala. Zithuthukisa ukugqama, zizenze zibe zinhle emisebenzini efana nokudoba, njengoba zingasiza ukuhlukanisa phakathi kwamanzi nezinto ezingaphansi kwamanzi.
  • Amalensi aphuzi: Amalensi aphuzi angcono kakhulu ekuthuthukiseni umehluko ezimeni eziphansi - ezikhanyayo noma ezimnyama. Zivame ukusetshenziselwa ukushushuluza noma ukudubula, njengoba zingenza izinto zigqame ngokucace kakhulu uma kuqhathaniswa nengemuva. Nokho, azikufanelanga ukukhanya kwelanga okukhanyayo njengoba zingavimbi ukukhanya okwanele okubonakalayo.

3. I-polarization

• Yehlisa ukuxhopha: Izibuko zelanga ezinemibala egqamile zisebenza kahle kakhulu ekwehliseni ukuxhopha okuvela endaweni eyisicaba njengamanzi, iqhwa, nama-hood ezimoto. Ukucwebezela kungabangela ukungakhululeki futhi kunciphise ukucaca okubonakalayo. Uma ukukhanya kuveza lezi zindawo, kuba polarized ngokuvundlile. Amalensi ane-polarized anesihlungi esikhethekile esivimba lokhu kukhanya okuvundlile, ngaleyo ndlela kunciphise ukuxhopha. Lokhu kunenzuzo ikakhulukazi emisebenzini efana nokugibela isikebhe, ukudoba, nokushayela, njengoba kuthuthukisa ukubonakala futhi kunciphisa ubunzima bamehlo.

4. Ikhwalithi yelensi

• Ukucaca okubonakalayo: Amalensi ekhwalithi ephezulu kufanele abe nokucaca okuhle kakhulu kokubona. Hlola noma yikuphi ukuhlanekezela, ukufiphala, noma ukusonteka ngokubheka kumalensi emgqeni oqondile, njengonqenqema lomnyango noma ifremu yewindi. Gudluza izibuko ngesikhathi ubuka umugqa; uma umugqa ubonakala ugoba noma untengantenga, ikhwalithi yelensi impofu.
• Scratch - ukumelana: Njengoba izibuko zelanga zivame ukusetshenziswa ngaphandle, amalensi ajwayele ukuklwebheka. Amalensi ane-scratch - ukunamathela okuqinile angagcina ukucaca nokuqina kwawo ngokuhamba kwesikhathi. Amalensi epulasitiki ambozwe kanzima noma amalensi engilazi anwaya kakhulu - amelana nokuqhathaniswa namalensi epulasitiki avamile.
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5. Uhlaka lulingana

• Induduzo: Uhlaka kufanele lulingane kahle ebusweni bakho ngaphandle kokubangela amaphuzu okucindezela ekhaleni noma ezindlebeni. Zama kumafreyimu ahlukene ukuze uthole usayizi olungile nesimo sobuso bakho. Amathempeli kufanele ahlale kahle kodwa angaqini kakhulu emaceleni ekhanda lakho, futhi ama-pads ekhaleni kufanele asekele isisindo sezibuko ngokulinganayo ekhaleni.
• Ukumboza: Uhlaka kufanele lunikeze ukumboza okwanele ukuvikela amehlo akho ekukhanyeni kwelanga okuvela emaceleni. Amafreyimu asongayo ayinketho enhle njengoba engavimba ukukhanya okuzungezile okwengeziwe, ehlise inani lemisebe ye-UV kanye nokuxhopha okufinyelela amehlo akho kusuka ezinhlangothini.