Los ntawm cov thawj hnub tom qab lub tsos ntawm ib tug me nyuam mos yug cov niam txiv tshiab mus nrhiav kev pab kom to taub, mus rau leej twg yog ntau zoo li ib tug me nyuam. Thiab yog hais tias tus duab ntawm lub pob muag los yog muab lub puab tsaig tseem sov ua licas yuav kiag cov lus teb rau cov lus nug no, ces cov xim ntawm lub qhov muag yog tsis zoo li. Thaum yug, ib tug ntau ntawm cov kob xiav iris, tab sis thaum ib tug me nyuam lub qhov muag xim kev hloov, tej zaum lawv yuav tig mus ua ntsuab, thiab grey.
Yuav ua li cas puas muaj tus me nyuam zoo nkaus li
Tsos tus me nyuam muaj peev xwm tiag hloov ib tug ob peb lub hlis tom qab yug tus me nyuam. Lub cev zoo lawm, qhov ntswg zoo thiab qhov muag xim kev hloov no yog tshwj xeeb yog hnov li cas. Cov me nyuam yug los cia li ob peb hnub dhau los, nws yog feem ntau ib tug su lub plab, o ob lub mis thiab elongated lub cev. Tej zaum cov me nyuam yog me ntsis beveled ntswg, uas yuav sai sai no coj ib tug kiag li tej daim ntawv. Thaum kawg, cov iris feem ntau kaj xiav, tab sis nrog lub sij hawm cov me nyuam hloov qhov muag xim.
Yog vim li cas hloov qhov muag xim
tus me nyuam lub qhov muag muaj tib tus qauv li hais tias ntawm ib tug neeg laus. Nws muaj xws li cov optic qab haus huv, lub cornea thiab lens. Visual acuity ntawm tus me nyuam mos yog txo kom tsawg thiab ua hnub los ntawm hnub, aspiring rau cov neeg laus npaum li cas. Twb tau nyob rau hauv lub yim hnub tom qab yug tus me nyuam tus me nyuam muaj peev xwm ua kom pom tseeb nws lub zeem muag nyob rau hauv ib qho kev kawm rau ib tug ob peb lub vib nas this. Ib ob peb lub hlis saib pib mus nyob ua si lawm, thiab nyob rau hauv rau lub hlis tus me nyuam twb distinguishes qhov zoo ntawm cov khoom. Nyob rau hauv lub xyoo nyob rau hauv lub quab yuam ntawm tus me nyuam txawm paub txog cov nuj nqis. Coloration ntawm lub iris ntawm tus me nyuam yog txiav txim tau los ntawm cov xim melanin. Nws muab ib tug loj tus naj npawb ntawm ib tug neeg xim av ob lub qhov muag, thiab yog hais tias ib tug me ntsis melanin, lub qhov muag yuav tsum grey. Melanin tsis cuam tshuam rau kev muaj peev xwm mus saib thiab muaj ib tug ob peb xyoos, thaum tus me nyuam yog hloov qhov muag xim kiag li. Twv seb nyob rau hauv ua ntej yuav ua li cas nws yuav ua tau cov xim ntawm lub qhov muag, nws yog ib qhov nyuaj, tab sis rau xim av-eyed neeg, raws li ib tug txoj cai, ntau tshaj lub teeb-eyed, yog li ntawd yog niam los yog txiv tsaus muag, cov me nyuam, feem ntau yuav, lawv kuj yuav xim av. Txhua tus neeg muaj ib tug xim-ua cov txheej txheem yuav siv sij hawm qhov chaw nyob rau hauv ntau txoj kev, li ntawd, tej zaum nws hloov tawm hais tias thaum ib tug me nyuam yog hloov cov xim ntawm lub qhov muag rau thawj lub sij hawm, qhov no tej zaum yuav tsis muab lub xeem kev xaiv, thiab cov tshiab kev hloov yuav muab qhov chaw nyob rau hauv ib tug ob peb lub hlis. Tseem ceeb tshaj, ua raws li los ntawm khiav, - cov xim ntawm tus menyuam. Yog hais tias cov menyuam kawm ntawv tus me nyuam cov pos huab thiab opaque, tej zaum nws yuav tsum yog ib tug yog vim li cas rau lub mus ntsib mus rau kws kho qhov muag. Tiv thaiv kom txhob lub qhov muag tus kab mob nyob rau hauv lub sij hawm yog tseem ceeb heev, yog li ntawd koj yuav tau mus tiag tiag xyuam xim rau cov xim ntawm cov menyuam kawm ntawv. Tab sis cov xim ntawm lub qhov muag yog tsis yog li ntawd ib qho tseem ceeb yog hais tias tus me nyuam yog kev zoo siab thiab noj qab nyob zoo.
Ib txhia txheeb cais
Feem ntau cov feem ntau, thaum ib tug me nyuam yog hloov cov xim ntawm lub qhov muag, nws yog xim av-eyed - nws yog lub feem ntau xim nyob rau hauv lub ntiaj teb no. Lub rarest Hawj txawm - ntsuab, pua pua ntawm cov me nyuam yog cov ob lub qhov muag yuav tsum tsuas yog ob tug, thiab txawm tsis yooj yim sua nyob rau hauv tej lub teb chaws kom tau raws li cov neeg uas muaj lub iris xim. Nyob rau hauv tas li ntawd, ib tug ntawm cov pua pua ntawm tus me nyuam yog nrog lub qhov muag ntawm ib tug txawv xim. Qhov no tshwm sim yog hu ua heterochromia, thiab cov tsis pom kev zoo , nws tsis yog. Geneticists ntseeg tau hais tias cov niam txiv uas sib txawv xim ob lub qhov muag yuav tus me nyuam, Iris uas yuav ua tau tej yam nyob rau hauv nruab nrab ntxoov niam thiab dads ob lub qhov muag, ntawm chav kawm, yog ib tug ntawm lawv xim av-eyed.