Vacheche vanotoona zviri kure, uye pavanokura maziso avo anokurawo kusvika vasvika pakuona "kwakakwana", kunonzi emmetropia.
Hazvisati zvanyatso zivikanwa kuti chii chinoratidza ziso kuti yave nguva yekurega kukura, asi tinoziva kuti muvana vazhinji ziso rinoramba richikura kupfuura emmetropia uye vanotanga kuona zviri pedyo.
Chaizvoizvo, kana ziso rikareba zvakanyanya, chiedza chiri mukati meziso chinotanga kuoneka pamberi pe retina kwete pa retina, zvichikonzera kusaona zvakanaka, saka tinofanira kupfeka magirazi kuti tichinje ma optics totarisa chiedza pa retina zvakare.
Patinokura, tinosangana nematambudziko akasiyana. Nyama dzedu dzinooma uye lenzi haigadzirike zviri nyore saka tinotanga kurasikirwa nekuona zviri pedyo.
Vanhu vakuru vazhinji vanofanira kupfeka magirazi maviri ane magirazi maviri akasiyana - rimwe rekugadzirisa matambudziko ekuona pedyo uye rimwe rekugadzirisa matambudziko ekuona kure.
Mazuva ano, vana vanopfuura hafu nevechiri kuyaruka muChina havaoni zviri pedyo, zvichienderana neongororo yakaitwa nemasangano ehurumende epamusoro, iyo yakakurudzira kuti pave nekuedza kwakasimba kudzivirira nekudzora chirwere ichi. Kana uchifamba mumigwagwa yeChina nhasi, uchaona nekukurumidza kuti vechidiki vazhinji vanopfeka magirazi.
Dambudziko rekuChina chete here?
Kwete zvechokwadi. Kuwedzera kwehuwandu hwemyopia hakusi dambudziko rekuChina chete, asi idambudziko guru rekuEast Asia. Sekureva kweongororo yakaburitswa muThe Lancet medical journal muna 2012, South Korea ndiyo iri pamberi, ne96% yevechidiki vane myopia; uye huwandu hweSeoul hwakatokwira. MuSingapore, nhamba iyi i82%.
Chii chinokonzera dambudziko iri revanhu vose?
Zvinhu zvakawanda zvine chekuita nehuwandu hwakawanda hwekuona zviri pedyo; uye matambudziko matatu makuru anowanikwa kushaya mitambo yekurovedza muviri panze, kushaya hope dzakakwana nekuda kwebasa rakawanda rekunze kwechikoro uye kushandisa zvakanyanya zvigadzirwa zvemagetsi.
