Ngokufanayo namatayara, iibrashi zamazinyo kunye neebhetri, iilensi nazo zinexesha lokuphelelwa.Ke, zingahlala ixesha elingakanani iilensi?Ngokwenyani, iilensi zinokusetyenziswa ngokufanelekileyo kangangeenyanga ezili-12 ukuya kwezili-18.

1. Ukutsha kwelensi
Ngethuba lokusetyenziswa kwe-lens optical, umphezulu uya kugqithwa kwinqanaba elithile.I-resin lens inokufunxa imitha ye-ultraviolet, kodwa kwangaxeshanye, ilensi iya kuguga kwaye ijike ibe tyheli.Ezi zinto ziya kuchaphazela ukuhanjiswa.

2. Ummiselo uya kutshintsha minyaka le
Ngokutshintsha kweminyaka, indawo yamehlo kunye neqondo lokusetyenziswa, imeko ye-refractive yeliso lomntu ishintshile, ngoko ke kuyimfuneko ukuphinda i-optometry rhoqo ngonyaka okanye unyaka kunye nesiqingatha.

Abantu abaninzi bacinga ukuba amehlo abo abekiwe.Logama nje iiglasi ze-myopia zingalunganga, kulungile ukuzinxiba iminyaka eliqela.Kwanabanye abantu abadala banomkhwa “wokunxiba iiglasi ngaphezulu kweminyaka elishumi”.Enyanisweni, olu qheliselo aluchanekanga.Ingaba i-myopia okanye iiglasi ze-presbyopic, kufuneka zihlolwe rhoqo kwaye zitshintshwe ngexesha xa ukungahambi kakuhle kwenzeka.Izigulana eziqhelekileyo ze-myopia kufuneka zitshintshe iiglasi zazo kanye ngonyaka.

Abaselula abakwixesha lophuhliso lomzimba, ukuba banxibe iiglasi ezimnyama ixesha elide, i-retina ye-fundus ayiyi kufumana ukukhuthazwa kwezinto ezicacileyo, kodwa iya kukhawulezisa ukuphuhliswa kwe-myopia.Ngokuqhelekileyo, ulutsha olunxiba iindondo ze-myopia kufuneka lujongwe amehlo rhoqo emva kweenyanga ezintandathu.Ukuba kukho utshintsho olukhulu kwiqondo, njengokunyuka kwama-degrees angaphezu kwama-50, okanye iiglasi zigqithise kakubi, kufuneka zitshintshe iiglasi ngexesha.

Abantu abadala abangawasebenzisiyo amehlo ngokufuthi bafanele bajongwe amehlo abo kube kanye ngonyaka baze bajongwe neendondo zabo ukuba akukho monakalo kusini na.Nje ukuba kukho umkrwelo kumphezulu welensi, kuya kuchaphazela ngokucacileyo ukusebenza kwayo kokulungiswa kwamehlo.Iiglasi ze-presbyopic zabantu abadala kufuneka kwakhona zitshintshwe rhoqo.I-Presbyopia ibangelwa ukuguga kwelensi.Iqondo lokuguga lelensi liyanda ngokukhula.Emva koko idigri yelensi yonyuswa.Abantu abadala kufuneka batshintshe iindondo zabo xa benengxaki yokufunda amaphephandaba namehlo abo edumbile.