Ukukhanya okuluhlaza okwesibhakabhaka i-spectrum yokukhanya ebonakalayo enobude obufushane beza beza namandla aphezulu, futhi kufana nemisebe ye-ultraviolet, ukukhanya okuluhlaza kunakho kokubili izinzuzo nezingozi.
Ngokuvamile, ososayensi bathi i-spectrum yokukhanya ebonakalayo ihlanganisa imisebe ye-electromagnetic enobude obusuka kuma-nanometers (nm) angu-380 (nm) ekugcineni kwe-spectrum kuya cishe ku-700 nm ekugcineni okubomvu.(Ngaphandle kwalokho, i-nanometer iyingxenye yebhiliyoni yemitha - lokho kuyimitha engu-0.000000001!)
Ukukhanya okuluhlaza ngokuvamile kuchazwa njengokukhanya okubonakalayo okusuka ku-380 kuya ku-500 nm.Ukukhanya okuluhlaza okwesibhakabhaka kwesinye isikhathi kuphinde kuhlukaniswe kube ukukhanya okuluhlaza okwesibhakabhaka-violet (cishe u-380 kuya ku-450 nm) nokukhanya okuluhlaza okwesibhakabhaka-turquoise (cishe u-450 kuya ku-500 nm).
Ngakho-ke, cishe ingxenye eyodwa kwezintathu yakho konke ukukhanya okubonakalayo kuthathwa njengokukhanya okunamandla abonakalayo (HEV) noma ukukhanya “okuluhlaza okwesibhakabhaka”.
Kunobufakazi bokukhanya okuluhlaza okungaholela ekushintsheni kokubona unomphela.Cishe konke ukukhanya okuluhlaza okwesibhakabhaka kudlula ngqo ngemuva kwe-retina yakho.Olunye ucwaningo lubonise ukukhanya okuluhlaza okwesibhakabhaka kungase kwenyuse ingozi yokonakala kwe-macular, isifo se-retina.
Ucwaningo lukhombisa ukuchayeka kokukhanya okuluhlaza okwesibhakabhaka kungaholela ekuwohlokeni kwe-macular okuhlobene neminyaka, noma i-AMD.Ucwaningo olulodwa lwathola ukukhanya okuluhlaza okwesibhakabhaka kubangele ukukhishwa kwama-molecule anobuthi kumaseli e-photoreceptor.Lokhu kudala umonakalo ongaholela ku-AMD.
Eminyakeni embalwa edlule, sakha isizukulwane sokuqala sikablue light blocking lens.Ngokusungulwa kobuchwepheshe esikhathini esidlule, wethublue blocking lenszithuthukiswa ngokwemvelo ngangokunokwenzeka ukuze kungabonakali.
Eyethublue light blockingamalensiabe nezihlungi ezivimba noma ezimunca ukukhanya okuluhlaza okwesibhakabhaka.Lokho kusho ukuthi uma usebenzisaleziilensiesuma ubuka isikrini, ikakhulukazi ngemva kokumnyama, angasiza ekunciphiseni ukuchayeka kumagagasi okukhanya aluhlaza angakugcina uphapheme futhi akusize ekunciphiseni ukucindezeleka kwamehlo.Kodwa-ke, abanye abantu bathi ukukhanya okuluhlaza okwesibhakabhaka kumadivayisi edijithali akubangeli i-eyestrain.Izinkinga abantu abakhala ngazo zivele zidalwa wukusetshenziswa ngokweqile kwemishini yedijithali.
Isikhathi sokuthumela: Feb-16-2022