Ib yam li cov log tsheb, txhuam hniav thiab roj teeb, lo ntsiab muag kuj muaj hnub tas sij hawm.Yog li ntawd, lo ntsiab muag yuav kav ntev npaum li cas?Qhov tseeb, lo ntsiab muag tuaj yeem siv tau rau 12 lub hlis txog 18 lub hlis.

1. Lens freshness
Thaum lub sij hawm siv optical lens, qhov saum npoo yuav hnav mus rau ib qho twg.Lub lens resin tuaj yeem nqus tau ultraviolet rays, tab sis tib lub sijhawm, lub lens tseem yuav muaj hnub nyoog thiab tig daj.Cov yam ntxwv no yuav cuam tshuam rau kev xa tawm.

2. Cov tshuaj yuav hloov txhua xyoo
Nrog rau kev hloov ntawm lub hnub nyoog, qhov muag ib puag ncig thiab qib ntawm kev siv, lub xeev refractive ntawm tib neeg lub qhov muag tau hloov pauv, yog li nws yog ib qho tsim nyog yuav tsum rov kho optometry txhua xyoo lossis ib xyoos ib nrab.

Ntau tus neeg xav tias lawv qhov muag pom tau raug teeb tsa.Tsuav yog cov tsom iav myopia tsis phem, nws yog qhov zoo los hnav lawv rau ntau xyoo.Txawm tias qee cov neeg laus muaj tus cwj pwm ntawm "hnav looj tsom iav rau ntau tshaj kaum xyoo".Qhov tseeb, qhov kev coj ua no tsis raug.Txawm hais tias nws yog myopia lossis presbyopic tsom iav, lawv yuav tsum tau kuaj xyuas tsis tu ncua thiab hloov lub sijhawm yog tias tsis xis nyob tshwm sim.Cov neeg mob myopia feem ntau yuav tsum hloov lawv cov iav ib xyoos ib zaug.

Cov tub ntxhais hluas uas nyob rau lub sijhawm ntawm kev loj hlob ntawm lub cev, yog tias lawv hnav tsom iav qhov muag tsis pom lub sijhawm ntev, lub retina ntawm lub fundus yuav tsis tau txais kev txhawb nqa ntawm cov khoom ntshiab, tab sis yuav ua rau kev loj hlob ntawm myopia.Feem ntau hais lus, cov tub ntxhais hluas uas hnav tsom iav myopia yuav tsum tau kuaj xyuas qhov muag txhua rau lub hlis.Yog tias muaj kev hloov pauv loj hauv qib, xws li nce ntau dua 50 degrees, lossis cov tsom iav tsis zoo, lawv yuav tsum tau hloov cov iav hauv lub sijhawm.

Cov neeg laus uas tsis siv lawv lub qhov muag feem ntau yuav tsum tau kuaj xyuas qhov muag ib xyoos ib zaug thiab kuaj xyuas lawv cov tsom iav puas.Thaum muaj qhov khawb ntawm lub lens nto, nws yuav pom tseeb cuam tshuam rau nws qhov kev kho qhov muag kho qhov muag.Cov iav presbyopic ntawm cov neeg laus yuav tsum tau hloov tsis tu ncua.Presbyopia yog tshwm sim los ntawm kev laus ntawm lub lens.Qhov kev laus ntawm lub lens nce nrog lub hnub nyoog.Tom qab ntawd lub lens degree yog nce.Cov neeg laus yuav tsum hloov lawv cov iav thaum lawv muaj teeb meem nyeem ntawv xov xwm thiab lawv qhov muag o.