• Ta yaya mutane ke samun hangen nesa?

Haƙiƙa jarirai suna da hangen nesa, kuma yayin da suka girma idanunsu suna girma har sai sun kai ga “cikakkiyar gani”, wanda ake kira emmetropia.

Ba a yi cikakken bayanin abin da ke nuna ido cewa lokaci ya yi da za a daina girma ba, amma mun san cewa a cikin yara da yawa ido yana ci gaba da girma bayan emmetropia kuma sun zama masu hangen nesa.

Ainihin, lokacin da ido yayi tsayi da yawa hasken da ke cikin ido yana zuwa ya mayar da hankali a gaban retina maimakon a ido, yana haifar da blush hangen nesa, don haka dole ne mu sanya gilashin don canza na'urar gani kuma a sake mayar da hasken a kan kwayar ido.

Lokacin da muka tsufa, muna shan wahala daban-daban.Naman jikin mu ya yi ƙarfi kuma ruwan tabarau baya daidaitawa da sauƙi don haka mu fara rasa hangen nesa kusa.

Yawancin tsofaffi dole ne su sanya bifocals waɗanda ke da ruwan tabarau daban-daban guda biyu-ɗaya don gyara matsalolin da ke kusa da hangen nesa kuma ɗaya don gyara matsalolin hangen nesa.

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A halin yanzu, fiye da rabin yara da matasa a kasar Sin ba su da hangen nesa, a cewar wani bincike da wasu manyan hukumomin gwamnati suka yi, wanda ya yi kira da a kara kaimi wajen yin rigakafi da shawo kan lamarin.Idan kun yi tafiya a kan titunan kasar Sin a yau, za ku lura da sauri cewa yawancin matasa suna sanya tabarau.

Shin matsalar China ce kawai?

Tabbas a'a.Ci gaban cutar myopia ba kawai matsalar kasar Sin ba ce, amma ita ce ta musamman ta gabashin Asiya.A cewar wani binciken da aka buga a mujallar kiwon lafiya ta Lancet a shekara ta 2012, Koriya ta Kudu ce ke jagorantar fakitin, tare da kashi 96 cikin 100 na matasa masu fama da cutar myopia;kuma farashin Seoul ya ma fi haka.A Singapore, adadin ya kai kashi 82%.

Menene tushen wannan matsala ta duniya?

Abubuwa da yawa suna da alaƙa da babban adadin kusancin gani;sannan manyan matsaloli guda uku ana samun rashin motsa jiki a waje, rashin isasshen barci saboda yawan aiki na karin karatu da yawan amfani da kayan lantarki.

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