I roto i te ao o te auahatanga whatu, e rua ngā momo matua o te hoahoa karāhe: he porowhita me he porowhita. Ko ngā karāhe porowhita, e whai ana i te angiangi, me huri te piko o te karāhe, he rerekē rawa atu i te piko o te mata karāhe porowhita tuku iho. Ko te hoahoa porowhita, i kitea noa i mua, i raru i te pikinga o ngā hapa me ngā whakapōturitanga. He maha ngā wā ka hua ake he raruraru nui pēnei i te pōuri o ngā whakaahua, te tirohanga hē, me te iti o te tirohanga.
Ināianei, kua puta ake te hoahoa āporo hei kaha whakatikatika, e whakatika ana i ēnei hapa tirohanga me te whakarato i tētahi otinga e tuku ana i ngā karāhe he māmā ake, he angiangi ake hoki, engari he papatahi hoki. He mea nui, kāore ēnei whanaketanga e whakararu i te ātete pānga pai o ngā karāhe, e whakarite ana i tētahi wheako mau haumaru.
He ngoikoretanga nui tō ngā karāhe porowhita tuku iho – ka āhua pōturi ngā mea e tirohia ana i te taha o te karāhe, ka whakawhāiti i te tirohanga a te kaimau. I tēnei wā e whanake tonu ana te hangarau, ka whakaitihia e ngā karāhe aspheric – he mea whakamiharo tūturu – ngā hapa i te taha o te karāhe, ka whānui ake te tirohanga kia tutuki ai ngā hiahia o te kiritaki. He papatahi te piko o te turanga o ngā karāhe aspheric, ā, he mama ake, ka whakarei ake i te āhua taiao me te ataahua. Ina koa i ngā wā he nui te kaha whakaata, ka tino whakaitihia e rātou te pōturi o te kanohi, ka waiho hei whiringa pai mō ngā kiritaki he nui ake ngā hiahia rongoā.
Ko te āhuatanga matua o ngā karāhe āporo ko tōna piko mata ahurei. He maha ngā painga o tēnei hoahoa āporo i ngā karāhe porowhita tuku iho:
1. Mārama: Mā te tukanga paninga motuhake, ka whakaratohia e ngā karāhe aspheric he mahi tirohanga tino pai, kia mārama ai, kia whakamarie ai hoki te wheako mātakitaki.
2. Whakamarie: Nā te mama rawa, me te mea kāore e kitea, ka whakaitihia e ngā karāhe aspheric te 'taumaha' ki ō kanohi, ka taea ai te noho marino me te ngāwari o te mau.
3. Tirohanga Taiao: Ka whakaitihia e tā rātou hoahoa ā-whatuwhatu te whakapōturitanga tirohanga, ka hua ake he tirohanga pono ake, he tika ake hoki.
Ki te whakataurite i ngā karāhe porowhita me ngā karāhe āporowhita o te rauemi ōrite me te whakaritenga, ka kitea he papatahi, he angiangi, ā, he pono ake, he whakamarie ake hoki ngā wheako mātakitaki. Mā te mātakitaki i te āhua paninga o te karāhe ki te pūtake mārama ka kitea he tika ake ngā whakaata mai i ngā karāhe porowhita (engari i roto i ngā karāhe kaha whakaata teitei); heoi, he nui ake te piko o ngā karāhe āporowhita nā te rerekētanga o ngā piko puta noa i ō rātou mata.
Ko ngā taha taha o ngā karāhe porowhita tuku iho, ehara i te mea he matotoru ake te āhua, engari he whakapōturi, he takahuri hoki te tirohanga o ngā mea, he āhuatanga e mōhiotia ana ko te ahua rerekē o te ahua. Hei whakatutuki i tētahi hoahoa māmā, kua whakamahia ngā rauemi taupū whakaata teitei i roto i te hanga karāhe. Heoi anō, ina tirohia mā roto i ngā karāhe porowhita, ka kitea te rerekētanga o ngā āhua o te mata o te kaimau. He rerekē, ko ngā karāhe aspheric ka whakaiti i te matotoru o waenganui me te taha, ka hua ake he karāhe angiangi ake e whakakore ana i ngā rerekētanga taha, ā, ka tukuna he wheako tirohanga tūturu.
Mā ngā karāhe aspheric ka whānui te tirohanga, kāore hoki e piko i ngā taha, me te iti o te rerekētanga o te ahua, ka tino tūturu ngā ahua. E toru ngā wā e pakeke ake ana ēnei karāhe i ō rātou hoa porowhita, ā, he tino pai mō ngā tamariki e mau ana. Mā te whakahaunga -5.00DS ōrite, e 26% te māmā ake o ngā karāhe aspheric i ngā karāhe porowhita. Mā te mata papatahi ka kitea he tirohanga tūturu, kāore e piko te ao, i te taha tata me te taha tawhiti, ka whakaiti i te ngenge o te kanohi mō ngā wā roa.
He mea tino pai mō te hunga e mau ana i ngā mōhiti kanohi mō te wā tuatahi, inā koa ngā ākonga me ngā kaimahi tari, ka tino whakaitihia e ngā karāhe aspheric te mamae tuatahi e pā ana ki te mau mōhiti. He huarahi pai hoki ēnei mō te hunga e whakamahi ana i ngā karāhe whakapā, hei mōhiti kanohi tārua i te kāinga. He tino whaihua ngā karāhe aspheric ki te tirohanga taiao, he rite ki te wheako me ngā karāhe whakapā. He mea tino pai mō te hunga e pai ake ana ki te whakaiti i te nui o ā rātou tohutohu, e hiahia ana ki te karo i te āhua o ngā kanohi iti me ngā mōhiti myopia, e whai ana ki te whakamama i te taumaha o ā rātou karāhe, he rerekē rānei ngā hiahia tirohanga mō ia kanohi.
Ka taea e ngā karāhe arotahi āporo te hoatu i te āhua angiangi, papatahi hoki ki ngā karāhe arotahi taupū whakaata waenga, pērā i ngā karāhe arotahi taupū whakaata teitei, e whakaiti ana i ngā hapa taha, e whakatutuki ana hoki i te tirohanga whānui e ea ai ngā hiahia katoa o ngā kiritaki.
Wā tuku: Hanuere-04-2024