Ko te whiriwhiri i ngā karāhe whakapā tika me arotahi ki ētahi kaupapa matua. He ngohengohe, he pīwariwari hoki te kornea, te paparanga o waho o te kanohi. Ahakoa he haurua mirimita noa iho te angiangi, he tino matatau tōna hanganga me tana mahi, e whakarato ana i te 74% o te mana whakaata o te kanohi. Nā te mea ka pā tika ngā karāhe whakapā ki te mata o te kornea, ko te mau i aua ka ārai i te ngongo hāora o te kornea ki tētahi taumata. Nō reira, kaua rawa e whakahawea ki te whiriwhiri i ngā karāhe.

I tēnei whakaaro, ka tūtohu ngā tākuta kia aro nui ki ngā tohu e whai ake nei i te wā e whiriwhiri ana:ngā karaihe whakapā:

Rauemi:
Mō te whakamarie, whiriwhiria te rauemi hydrogel, he mea e tika ana mō te nuinga o ngā kākahu o ia rā, inā koa te hunga e aro nui ana ki te whakamarie. Mō te mau roa, whiriwhiria te rauemi silicone hydrogel, he mea e tuku ana i te uruhanga hāora teitei, ā, he mea tino pai mō te hunga e noho roa ana i mua i te rorohiko.

Piko Pūtake:
Mena kāore anō kia mau i ngā karaihe whakapā i mua, ka taea e koe te toro atu ki tētahi whare rongoā kanohi, ki tētahi toa tirohanga rānei hei whakamātautau. Me whiriwhiri te piko turanga o ngā karaihe i runga i te pūtoro piko o te mata o mua o te kornea. I te nuinga o te wā, e taunakihia ana kia 8.5mm ki te 8.8mm te piko turanga. Mena ka paheke ngā karaihe i te wā e mau ana, he maha ngā wā ka puta he piko turanga nui rawa. I tetahi atu taha, ka taea e te piko turanga iti rawa te whakararuraru i ngā kanohi i te wā e mau ana mō te wā roa, te whakararuraru i te whakawhiti roimata, me te arahi ki ngā tohu pēnei i te hypoxia.

Te Āheinga Hāora:
E pā ana tēnei ki te kaha o te rauemi karāhe ki te tuku i te hāora kia puta, e whakaatuhia ana ko te uara DK/t. E ai ki te International Association of Contact Lens Educators, me nui ake te uruhanga hāora o ngā karāhe whakakorekore o ia rā i te 24 DK/t, ko ngā karāhe roa-mau me neke ake i te 87 DK/t. I te wā e whiriwhiri ana i ngā karāhe, whiriwhiria ngā mea he nui ake te uruhanga hāora. Heoi, he mea nui kia wehewehe i waenga i te uruhanga hāora me te tukunga hāora:Te Tukunga Hāora = Te Āheinga Hāora / Te Matotoru WaenganuiKaua e tinihangatia e te uara uruhanga hāora kua whakarārangihia ki runga i te takai.

Te Ihirangi Wai:
I te nuinga o te wā, e kiia ana he pai te nui o te wai i roto i te awhe o te 40% ki te 60%. Hei tāpiri, mā te hangarau pupuri makuku pai ake o te arotahi ka pai ake te whakamarie i te wā e mau ana. Heoi, kia mahara ko te nui o te wai ehara i te mea pai ake i ngā wā katoa. Ahakoa he ngawari ake ngā arotahi ki te nui o te wai, ka maroke ake ngā kanohi i te wā e mau ana mō te wā roa.

Hei whakarāpopototanga, ko te whiriwhiri i ngā karaihe whakapā me whai whakaaro whānui ki te āhua o ō kanohi, ki ō tikanga mau, me ō hiahia. I mua i te mau, me tirotiro ō kanohi, ā, me whai i ngā tohutohu a tō tākuta kia pai ai te hauora o ō kanohi.