Te mārama ki te tirohanga tata (hyperopia)
Tirohanga tawhiti ranei Hiporopia he āhuatanga rerekē ngā taputapu whatu te wāhi e kore e taea e te kanohi te kite mārama i te pūwāhi tata, e ahua pōuri rānei te pūwāhi tata. Ahakoa he uaua ki te tirotiro i te pūwāhi tata, ka taea e te hunga whai tirohanga tawhiti te kite mārama i te pūwāhi tawhiti. Ko te pūwāhi tata te tawhiti tata rawa atu ka taea e te kanohi noa te kite mārama. Ko te pūwāhi tata o te tangata noa he kanohi noa he 25 cm. Ko te pūwāhi tawhiti rawa atu ka taea e te kanohi noa te kite mārama. Ko te pūwāhi tawhiti mutunga kore o te tangata noa he kanohi noa. Ko te mutunga kore he kupu e whakamahia ana hei whakaahua i te tawhiti o ngā mea e tino tawhiti ana.
Ngā Take o te Tirohanga Tata
Ngā kanohi noa Ka taea te kite mārama i te pūwāhi tata nā te mea e aro tika ana te hihi mārama ki te retina. Mēnā kāore e taea e te kanohi e kite tata ana te kite mārama i te pūwāhi tata, kāti kāore te hihi mārama e aro tika ana ki te retina. I roto i te kanohi tangata noa, ka taea te arotahi tika i te hihi mārama ki te retina ina 25 cm te pūwāhi tata, ā, ina arotahihia te pūwāhi tata, ko te piko o te karu kanohi te mōrahi, arā, kāore e taea te piko atu. Nō reira, ko te pūwāhi tata o te 25 cm te tawhiti iti rawa e kore e taea te whakaiti i te radius piko o te kanohi.
Kāore e taea e ngā kanohi kite tata te arotahi ki tētahi pūwāhi tata e 25 henimita te tawhiti atu i te kanohi, nō reira he nui ake te roa arotahi me te radius piko o ngā kanohi kite tata i ngā kanohi noa. Ko te kornea me te karāhe arotahi te kawenga mō te whakawhiti i te mārama, nō reira ka taea te whakatau ko ngā kanohi kite tata he kornea me ngā karāhe arotahi he iti ake te piko, he papatahi rānei, kia nui ake ai te radius piko me te roa arotahi o ngā kanohi kite tata, ko ngā kornea me ngā karāhe arotahi he piko ake, he papatahi rānei, kia iti ake ai te radius piko me te roa arotahi o ngā kanohi kite tata.
I runga i te whakamārama o mua, ka taea te whakatau ko te take o te tirohanga tata ko te kore o te piko o te kornea me te karāhe o te kanohi i tō te kanohi noa, nō reira he nui ake te roa o te arotahi o te pūnaha kornea-karāhe, ka puta te hihi mārama mai i... pūwāhi tata kāore e taea te arotahi tika ki te retina engari ka arotahi ki muri i te retina. Kāore ngā hihi mārama mai i ngā mea tata e arotahi ki te retina, nō reira kāore e taea e ngā pūtau io i roto i te retina te huri i ngā ngaru mārama hei tohu hiko ka tukuna ki te roro.
Ko tētahi atu take e pāngia ai te tangata e te tirohanga tata ko te poto rawa o te wāhanga whakapae o te kanohi o te tangata, ā, ka taka ngā hihi mārama e hurihia ana e te kornea me te karāhe ki muri i te retina.
Hiporopia me presbyopiaKo te presbyopia he mate kanohi e heke ai te kaha o te kanohi ki te urutau, ā, ka neke atu te pūwāhi tata i te kaumātuatanga o te tangata. Presbyopia nā ngā āhuatanga o te pakeketanga ia ko te hyperopia nā ngā āhuatanga ira, i te tuku iho rānei.
Otinga mō te Tirohanga Tata
Ka arotahi te kanohi kite tata i ngā hihi mārama mai i pūwāhi tata kei muri i te retina. Kia noho noa ai ngā kanohi kite tata, me arotahi te hihi mārama ki te retina. Ka taea te arotahi i ngā hihi mārama ki te retina ina whakanohoia arotahi whakapūmau ara he karāhe pūkohu, ara he karāhe pai kei mua i te kanohi. Ka āwhina te karāhe pūkohu ki te kohikohi i ngā hihi mārama kia taea ai te arotahi tika ki te retina.
I roto i te oranga o ia rā, ka taea te whakatika i te tirohanga tata mā te whakamahi i ngā mōhiti, i ngā karaihe whakapā rānei. Kei roto i te tuhinga mō tēnei he whakamārama taipitopito me ngā tātaitanga pāngarau. ngā karaihe mōhiti dan ngā karaihe whakapā.
