Nō te mea, e ai ki ngā tohutohu maha, ka tuku ngā kēti holohipera kanohi karaka ākana i waenga i ngā whakamahi taunaki me ngā whakamahi pūmau. Tuatahitia, ko tō rātou āhua matihiko e waihanga ana i te whakamātau horopaki tūpono, e mahi ana hei whakatū tonu i te whakahē ki te whakawhitiwhiti i ngā mea hoko hoki me te whakarerekē i ngā mea. Ko te hononga matua o te kanohi karaka me ngā whatunga holohipera ka hanga i tētahi tohu matihiko kāore i kitea te wehe i te whakaputahia, taea noa mai e ngā pakihi i te tiaki i a rātou mea hoko me ngā pūmanawa. Ko te hunga whakapiri matua o ngā kēti i runga i te hunga whakapiri whakamua ka tae atu ki te whakapiri pai, tae atu ki ngā whenua iti, nō reira ka mau tonu te āhua o ngā holohipera. Ko tō rātou whanangatanga ka tae atu ki te whakarite i ngā momo whenua, pērā i te wai, ngā whakarereke o te werawera, me te whakarereke o te UV, ka noho tonu te whai i te pai i waenga i ngā wā. Mai i tētahi tūmomo whakamahi, ko ēnei kēti he whakaaetanga moni whakahirahira e taea ana te whakauru ki ngā rāngai whakapakoko me ngā rāngai whakamātau. Kaore i te hiahia i ngā hōhonu whakamahi mo te whakapiri me te whakamātau, nō reira ka ea ki ngā pakihi o ngā roanga. Ko te whakarite o ngā kēti kanohi karaka holohipera ka taea te whakarite i te whānui, i te āhua, me te hanga, ā, ka whakaae ki ngā pūmanawa ki te whakauru i a rātou tuhinga kawe i waenga i ngā whakamahi taunaki. No muri, ko ō rātou āhua whakarerekē e whakaatu ana i te whakamātau i tētahi whakarerekē, ka whakatupu i tētahi tūponotanga tonu mō ngā whakamahi whai hua.