TsimScience

Yuav ua li cas yog cov qauv ntawm cov tib neeg qhov muag?

Ib qho ntawm feem nthuav xai nyob rau hauv biology, tshwj xeeb yog nyob rau hauv tus tib neeg lub cev - yog lub qhov muag qauv. Txij ancient sij hawm nws yog nrog lub qhov muag txuam nrog ntau superstitions, legends thiab myths xwb. Muaj ib tug ntau ntawm sayings thiab ntawm uas nto moo tshaj plaws: "Ob lub qhov muag - cov daim iav ntawm tus ntsuj plig." Tab sis li cas lub qhov muag tiag tiag? Qhov ntawd yuav qhia rau zaum txog nws? Ophthalmologists thiab biologists, anatomists, tau ntev lawm ntse nyob rau hauv tib lub zeem muag system, peb pom hais tias qhov muag, txawm nws loj me me, muaj ib tug heev ntse ntaus ntawv. Yuav ua li cas - nyeem rau.

Vision - nws yuav tsis yooj yim

Ophthalmic ntaus ntawv nyob rau hauv lub cev hu ua Stereoscopic. Nyob rau hauv tib neeg lub cev nws yog lub luag hauj lwm kom ntseeg tau tias cov ntaub ntawv yog raug ntaus nqi, kom raug, tsis muaj distortion. Tsaug rau lub zeem muag cov ntaub ntawv tiav thiab ces kis mus rau lub hlwb.

Cov ntaub ntawv hais txog tus kwv nyob rau txoj cai nyob rau hauv lub hlwb yog kis tau los ntawm cov retinal cell mus rau sab xis. Nyob rau hauv tus txheej txheem no muab kev koom tes thiab cov optic paj. Tab sis dab tsi yog sab laug, tau txais thiab tshuaj xyuas rau sab laug-tes ib feem ntawm lub retina. Cov tib neeg lub hlwb yog tsim nyob rau hauv xws li ib tug txoj kev uas combines cov ntaub ntawv tsis muaj distortion, li no txoj kev ua ib tug tag nrho daim duab ntawm lub ntiaj teb no nyob ib ncig ntawm lub beholder.

qhov muag qauv qhia binocular tsis pom kev. Ob lub qhov muag tsim heev tham nyob rau hauv nws ntaus system. Nws yog vim nws cov neeg lub hwj chim rau perceive, ua cov ntaub ntawv tau txais los ntawm lub ntiaj teb sab nraum. Ib tug ntawm cov tswv yim no system - electromagnetic tawg. Nws yog raws li nyob rau hauv tib neeg lub zeem muag.

Yuav ua li cas puas nws ua hauj lwm?

Yog hais tias koj nyeem daim duab ntawm tus tib neeg qhov muag, nws yuav pom tias lub cev raws li ib tug tag nrho yog zoo li ib lub pob. Hais tias yog dab tsi tshwm sim los rau hauv lub npe ntawm nws "Kua." qhov muag qauv - nws yog ib lub sab hauv thiab peb successive txheej khaubncaws sab nraud povtseg:

  • sab nraum zoov;
  • vascular;
  • retina.

plhaub ob lub qhov muag

Yog li ntawd, nyob sab nraum ntawm ib co lug ntawm lub qhov muag? Lub uppermost ib feem yog hu ua tus "cornea". Qhov no ntaub, uas yuav muab piv nrog ib lub qhov rais ntsia mus rau lub surrounding ntiaj teb no. Nws yog los ntawm lub cornea teeb nkag mus rau hauv nrig txog kev pom system. Txij li thaum lub cornea yog convex, nws muaj peev xwm mus tsis tau tsuas yog nco lub rays ntawm lub teeb, tab sis refract lawv. Lwm yam yog ib feem ntawm lub qhov muag los ntawm sab nraum yog hu ua tus "sclera". Nws yog ib qho chaw khuam siab insurmountable rau lub teeb. Dig muag sclera zoo li lub hau qe.

Cov tom ntej no yog ib feem, muaj nyob rau hauv lub thiaj li hu ua lub teeb-sensitive lug ntawm lub qhov muag, hu ua lub choroid. Raws li twb lub npe no qhia, nws yog tsim hlab ntsha los ntawm kev uas cov ntshav rau cov ntaub so ntswg noj oxygen thiab lwm yam tsim nyog Cheebtsam thiab tshuaj. Lub plhaub muaj ib tug xov tooj ntawm Cheebtsam:

  • iris;
  • ciliary lub cev;
  • choroid.

Nws thiaj li tau tshwm sim hais tias cov neeg xyuam xim rau cov xim ntawm lub qhov muag ntawm tus interlocutor. Txoj kev nyob rau hauv uas nws yuav tsum tau txiav txim los ntawm tus kho qhov muag qauv ntawm lub qhov muag, uas yog lub iris: nws yog ib qho txuam nrog ntawm ib lub xim. Txij li thaum lub cornea yog lub iris tso cai rau koj mus saib lwm tus neeg, koj yuav tau txiav txim seb yog xim dab tsi ob lub qhov muag koj yuav ntsib ib tug txiv neej.

Cov menyuam kawm ntawv yog situated raws nraim nyob rau hauv qhov chaw ntawm lub iris. Nws muaj ib tug hloov puab, thiab loj hloov, ntawm nyob rau theem ntawm illumination. Dhau li ntawd, mydriasis cuam tshuam los ntawm ntau yam (e.g., uas tau txais tshuaj).

Mus sib sib zog nqus mus rau hauv lub

Yog hais tias koj saib tom qab lub iris, koj yuav saib tau rau pem hauv ntej lub koob yees duab. Nws yog ntawm no tias muaj mechanisms uas ua lub aqueous lom zem. Qhov no cov ntaub ntawv uas yog daim nyob rau hauv lub qhov muag, da dej ntawm nws cov Cheebtsam. Nyob rau hauv lub ces kaum ntawm lub koob yees duab tau muab qhov xwm ntawm tus kua system, los ntawm kev uas cov kua ntws tawm ntawm lub qhov muag. Thiab nyob rau hauv lub depths ntawm lub ciliary lub cev muaj peev xwm yuav ntes tau accommodative nqaij. Vim nws txoj kev ua hloov tus duab ntawm lub lens.

Ntxaum tseem yog lub choroid. Tus qauv ntawm tus tib neeg qhov muag yuav tsum tau muaj cov choroidal rov qab, thiab hais tias nws yog ib tug zoo nkauj thiab sonorous lub npe. Choroid yog nyob rau hauv kev sib cuag nrog lub retina, uas yog tsim nyog rau khoom noj kom zoo ntawm ntaub so ntswg.

Qhov thib peb plhaub

Raws li hais saum toj no, lub qhov muag qauv muaj xws li peb plhaub yuav tsum qhia rau lub retina. Raws li nram no los ntawm nws lub npe, yog ib tug plhaub mesh. Nws yog tsim los ntawm paj hlwb. Cov ntaub meem hauv lub puab nto ntawm lub qhov muag thiab guarantees zoo lub zeem muag, yog tias noj qab nyob zoo.

retinal qauv yog xws li hais tias ntawm no npaj duab uas tau los ntawm lub ntiaj teb sab nraum. Tab sis qhov sib txawv ntawm cov ntaub so ntswg muaj nuj nqi txawv. Maximum muaj peev xwm mus saib muab cov macula, uas yog qhov chaw. Qhov no yog vim high-density nrig txog kev pom cones. Cov ntaub ntawv tau txais los ntawm lub retina yog kis tau mus rau ib tug tshwj xeeb paj, uas cov khoom siv rau lub paj hlwb, qhov chaw uas lawv yuav ua kom sai.

Thiab yog dab tsi sab hauv tsev?

Yuav ua li cas yog cov qauv ntawm cov tib neeg qhov muag, yog tias koj saib nyob rau tag nrho peb ntawm lub plhaub? ob koob yees duab yuav nyob ntawm no:

  • pem hauv ntej;
  • rov qab.

Ob leeg uas tau sau nrog ib tug tshwj xeeb cov kua. Nyob rau hauv tas li ntawd, tseem muaj:

  • lens;
  • vitreous.

Cov thawj ntawm nws lub cev tsa ib tug lens, convex on ob sab. Nws yog tau refract teeb flux thiab kis tau nws. Tsaug rau cov hauj lwm ntawm lub lens nws yog tau ua kom pom tseeb rau hauv cov duab rau lub mesh ntawm neural cov ntaub so ntswg. Tab sis lub vitreous yog feem ntau zoo li jelly. Nws lub ntsiab hauj lwm - los mus tiv thaiv kev sib cuag ntawm cov fundus thiab lens.

Fibrous casing thiab conjunctive

Los ntawm kev kawm rau hauv lub layout qauv ntawm lub qhov muag, pib nrog lub conjunctiva. Nws yog ib tug pob tshab daim ntaub so ntswg sab nraum lub qhov muag. Nws them nws tawv muag daj hauv tawm. Vim lub conjunctiva ntawm lub ceev ceev tej zaum yuav raug swb yam tsis muaj kev puas tsuaj.

Tham txog dab tsi rau cov kev ua ntawm lub qhov muag lug, koj yuav tsis poob pom ntawm lub fibrous sheath. Ib feem ntawm nws yog tsim los ntawm cov sclera thiab muaj ib tug high ntom, uas guarantees tiv thaiv ntawm cov me puab cov ntsiab lus. Qhov no cov ntaub so ntswg them nyiaj yug, tab sis rau pem hauv ntej yog pob tshab, thiab yog zoo li tus iav rau ntawm lub moos. Qhov no ya yog feem ntau hu ua fibrous sheath cornea.

Lub pob tshab cover ib feem ntau nyob rau hauv paj hlwb, uas saib kuas conductivity ntaub ntawv. Thaum lub point qhov twg lub sclera mus rau hauv lub cornea nyaij, cais limb. Los ntawm no lub sij hawm yog to taub raws li ib tug concentration tsam qia hlwb. Ua tsaug rau lawv, cov txheej ib feem ntawm lub qhov muag yuav regenerated nyob rau hauv ib tug raws sijhawm.

qhov muag lub koob yees duab

Cov anterior chamber yog nyob nruab nrab ntawm lub iris thiab lub cornea, nyob rau hauv particular nws kaum sab xis thiab sai li sai tau saum toj no hais tias kua system. Ntsuam xyuas cov kev kho ntawm week thiab lug ntawm lub qhov muag, ib tug me ntsis ntxiv inland, koj yuav saib tau lub lens. Yog li ntawd nws tsis hloov los ntawm lub anatomically tseeb txoj hauj lwm, xwm muab cov nyias ligaments. Lawv txuas mus rau lub ciliary lub cev hloov khoom nruab nrog.

Lub pem hauv ntej thiab nram qab lub lag yog tag nrho ntawm dej, uas muaj tsis muaj xim. Qhov no kua nourishes lens, khoom siv uas tsim nyog rau lub hauj lwm ntawm lub zaub mov Cheebtsam ntawm lub cornea. Qhov no yog ib qho tseem ceeb vim hais tias cov ntsiab ntawm cov tib neeg tsis pom kev system tsis muaj nws tus kheej cov ntshav mov.

Optics - ib tug complex qauv

Tib neeg pom kev zoo yog muab los ntawm lub fact tias muaj refractive lug ntawm lub qhov muag. Nws yog vim lub complex optics ntawm lub nrig txog kev pom system yuav perceive cov ntaub ntawv los ntawm cov ib puag ncig. Yuav kho lub xaav ntawm qhov chaw nyob ib ncig ntawm koj, Yog hais tias ib tug neeg muaj nuj nqi feem ntau tag nrho cov nruab nrog cev thiab cov nqaij:

  • txhawb lug ntawm lub qhov muag;
  • lub teeb qhia;
  • perceiving.

Thaum ua hauj lwm raug, koj muaj peev xwm tsis ntseeg cov clarity uas tsis pom kev.

Ntsiab ntsiab ntawm tus kho qhov muag system:

  • cornea;
  • lens.

Nco ntsoov tias lub teeb-refracting qauv ntawm lub qhov muag muaj xws li ob qho tib si vitreous thiab cov dej muaj nyob rau hauv lub chamber ntawm lub qhov muag. Yog li ntawd, lub zeem muag yuav zoo xwb yog hais tias lawv:

  • pob tshab;
  • Nws muaj tsis muaj cov ntshav;
  • Lawv tsis muaj ib tug huab.

Tsuas yog thaum lub teeb rays kis tau los ntawm lub system, lawv nrhiav tau lawv tus kheej nyob rau hauv lub retina, uas yog lub tsim ntawm cov duab ntawm ib ncig chaw. Nco ntsoov hais tias nws yog manifested:

  • inverted;
  • txo.

Yog li generated paj impulses uas noj mus rau hauv lub paj thiab nws yog kis tau mus rau lub hlwb. Neurons tsom xam cov ntaub ntawv, uas tus neeg tau txais ib tug ncauj lus kom ntxaws to taub txog dab tsi puag ncig nws.

Lub cornea - lub qhov muag yog ib tug complex caij system

Los ntawm lub teeb-sensitive lug ntawm lub qhov muag yog cov sib txawv hais, tsis yog tus kawg tseem ceeb tshaj plaws uas yog lub cornea. Nws yog tsim ntawm tsib hom ntaub:

  • epithelium ntawm pem hauv ntej;
  • Reichert phaj;
  • stroma;
  • Descemet tus ntaub;
  • endothelium.

Txawm tias tsib assembles nyob rau hauv lub thickness ntawm lub cornea tsuas yog hais txog ib tug millimeter. Thov nco ntsoov: Txawm hais tias lub teeb-refracting qauv ntawm lub qhov muag yog tus loj, tus cornea - qhov no yog cia li ib tug thib tsib ntawm cov fibrous sheath uas yog, yog ib tug me me lub caij uas ib tug complex set.

Vertical cornea yog hais txog 11 hli, thiab dav - tsuas yog ib millimeter ntev. lub cev qauv muab cov tseem ntawm nws transparency: lub hlwb uas tsim cov ntaub, ua rau ib tug ncaj qha kev tswvyim. Lwm uas siv los ntawm qhov yuav tsim tau lub cornea - cov cais tawm ntawm cov hlab ntsha. Tab sis lub paj txoj no heev npaum li cas. Los ntawm lub teeb-refracting lug ntawm lub qhov muag yog ib tug ob peb ntaub so ntswg, tab sis nws yog ib qhov lub cev yus siab refractive lub hwj chim, thiab nws yog ib tug ntawm lub ntsiab.

ciliary lub cev

Los ntawm lub teeb-sensitive lug ntawm lub qhov muag tseem muaj lub Cheebtsam hais tias ua li ib tug ciliary lub cev. Nws yog ib feem ntawm lub choroid, cov sawv cev nws nruab nrab feem me ntsis loj nyob rau hauv thickness tshaj lub lwm yam hais. Dig muag, ciliary lub cev zoo li ib tug yeej rau cov menyuam. Conventionally, zaum faib nws mus rau hauv ob lub ntsiab:

  • vascular, uas yog tsim los ntawm cov hlab ntsha;
  • nqaij tsim ciliary nqaij.

Tus thawj tivthaiv sib txuas ntxiv ntawm txog 70 nyias dab peev xwm ntawm ua kua uas muab kev noj haus thiab purification ocular lug. Li no, dhau lawm, mus Zinn ligaments, vim uas lub lens yog nrees tsau rau ntawm qhov chaw vim nws.

Retin raws li ib tug ntawm lub ntsiab tseem ceeb ntawm cov nrig txog kev pom system

Qhov no cov ntaub so ntswg cev yog dej num raws li ib tug keeb ntawm cov nrig txog kev pom analyzer. Nws tseem ceeb feature - tus muaj peev xwm mus hloov lub teeb rau hauv paj impulses, uas yog ces tiav los ntawm tib neeg lub cev.

Raws li ib feem ntawm lub retina muaj rau khaubncaws sab nraud povtseg:

  • Pigmentosa (aka - lwm). Qhov no lub caij yog muaj peev xwm mus nqus teeb, uas lub dispersion nyhuv nyob rau hauv lub qhov muag yog significantly txo.
  • cell dab. Zaum hu rau lawv tus flasks thiab sticks. Cov dab tsim rhodopsin thiab iodopsin.
  • Lub ocular fundus. Nws yog lub active caij ntawm lub nrig txog kev pom system. Nyob rau kev xeem nws yog nws qhov muag pom ib qho ophthalmologist.
  • Vascular txheej.
  • Disc paj, qhia lub point qhov twg lub paj nyob rau hauv lub qhov muag.
  • Lub macula, los ntawm cov uas yog to taub li ntawd feem ntawm cov ntaub so ntswg, qhov twg feem ntau kev kub ceev ntawm cones, enabling xim lub zeem muag ntawm lub surrounding chaw.

Thiab yog dab tsi zoo ntawm cov kua?

Peb muaj twb tau ntau tshaj li ib zaug yuav tsum tau rau qub hauj lwm ntawm lub qhov muag intraocular kua uas nyob hauv lub chamber twb hais. Dig muag, thiab nws cov qauv yog feem ntau zoo li mus dej ntshiab. Tab sis nyob tus yeees ntawm cov aqueous lom zem yog zoo rau cov ntshav ntshav. Nws muab qhov tseeb lub hwj chim.

Yuav ua li cas tiv thaiv lub qhov muag?

Xav xws li ib tug me thiab yooj yim qauv, peb yuav tsis quav ntsej tus tiv thaiv mechanisms uas muab los ntawm cov xwm. Lub uppermost theem ntawm kev tiv thaiv - lub qhov muag socket. Nws yog ib tug repository ntawm cov pob txha. Yog hais tias koj nyeem lub qhov muag socket visually, nws yuav paub tseeb hais tias nws yog zoo li ib tug pyramid nrog plaub ntsej muag, tab sis seemed yuav truncated. Lub sab saum toj ntawm lub pyramid yog saib rau hauv lub pob txha taub hau. Lub inclination lub - 45 degrees. Cov tib neeg qhov muag socket tob yog hais txog 4 mus rau 5 cm.

Ceeb toom: qhov muag socket yog tiag tiag ntau tshaj ntawm ib tug ceev ceev. Nws yog tsim nyog yuav tau txais thiab ntawm no yog cov muaj roj lub cev, raws li zoo raws li paj thiab nqaij, leeg tshav system, uas saib kuas qhov tseeb hauj lwm ntawm lub qhov muag.

Tawv muag daj - kuj yog ib tug tivthaiv ntawm cov qauv ntawm lub qhov muag

Nyob rau hauv ib txwm noj qab nyob zoo tib neeg lub cev, txhua lub qhov muag yog kev tiv thaiv los ntawm ob centuries:

  • qis;
  • sab saum toj.

Lawv pab tiv thaiv lub cev tsis kho system los ntawm ntog khoom nraum zoov. Kaw muag daj tshwm sim looj hlias, cov tshuaj tiv thaiv yog instant tsis tau tsuas yog nyob rau hauv lub ntxa txaus ntshai, tab sis txawm thaum lub cua blows. Cov tawv muag daj tiv thaiv lub qhov muag thaum kov.

Blinking taw pab ntshiab cornea los ntawm hmoov av Cheebtsam. Ua tsaug rau lawv, tusyees kis kua muag kua. Nws yuav los nruab nrog tawv muag daj plaub muag loj hlob rau ntawm ntug. Nyob rau hauv peb lub sij hawm, lawv tau ua ib lub caij tseem ceeb ntawm lub tswv yim ntawm tib neeg kev zoo nkauj, tab sis lub ntuj tsim rau kev tiv thaiv ntawm lub nrig txog kev pom system. Vim lub cilia ntawm lub qhov muag yuav muaj kev tiv thaiv los ntawm hmoov av thiab me me khib nyiab uas yuav puas ilv fabrics.

Tib neeg tawv muag daj - ib tug es nyias txheej ntawm daim tawv nqaij uas ntaub ntawv wrinkles. Hauv qab lub epithelium yog lub npag txheej:

  • Yeej muab kaw;
  • lifting lub hau rau sab saum toj.

Tab sis rau sab hauv sab, raws li twb tau hais, yog hlua nrog conjunctiva.

Raws li lub kua muag tsim?

Nrog kua muag nyob rau hauv tib neeg kab lis kev cai yuav ib tug ntau ntawm tej yam tshwm sim, kev cai, txawm tus txoj kev xav. Lub classic kev nthuav qhia tsim tau ntau centuries: "loj cov txiv neej tsis txhob quaj", "Quaj txaj muag!". Yeej muaj tseeb kua muag - qhov no yog tsuas ib qho kev ntsuas ntawm kev puas hlwb muaj zog ntawm tus txiv neej? Xwm, tsim lacrimal apparatus, nrhiav los xyuas kom meej qhov kev tiv thaiv thiab kom tau hauj lwm ntawm lub nrig txog kev pom system, yog li nyob rau hauv qhov tseeb, txawm cov txiv neej muaj peev xwm them taus quaj, li no purifying thiab tiv thaiv koj lub qhov muag.

Kua muag yog pob tshab xws tej kua mob uas muaj zog alkalinity. Muaj pes tsawg leeg ntawm lub kua muag yog heev tham, tab sis ib tug tseem ceeb feem - cov dej huv. Qhov feem ib hnub twg - ntawm qhov kev txiav txim ntawm milliliters. Kua muag tiv thaiv lub qhov muag thiab pab khoom noj rau cov ntaub so ntswg, raws li zoo raws li ib tug zoo saib.

Lacrimal apparatus muaj xws li:

  • qog uas tsim cov kua muag;
  • taw tes ntawm cov kua muag;
  • raws;
  • hnab;
  • duct.

Hlau yog nyob rau hauv lub qhov rau hauv lub Upper ib feem ntawm nws cov phab ntsa, sab nraum. Nws nyob ntawm no hais tias tsim lub kua muag, uas ces poob mus xaiv raws, thiab ces - nyob rau ocular nto. Seem dej mus down mus rau qhov twg no conjunctival fornix muab.

Lacrimal cov ntsiab lus, muaj ob: sab saum toj thiab hauv qab. Ob leeg ntawm lawv - nyob rau hauv lub puab ces kaum, nyob rau ntawm cov npoo ntawm cov tawv muag. Los ntawm lawv, lub kua muag ntawm tus raws yog nyob rau hauv lub hnab nyob ze rau qhov tis ntawm lub qhov ntswg, ces - ncaj qha mus rau hauv lub qhov ntswg.

Yuav ua li cas rau qhov muag nqaij system?

Yog hais tias koj nyeem cov npag system, nws yuav tseeb hais tias cov rau cov nqaij yog ua tau hauj lwm nyob rau hauv tus tib neeg lub qhov muag. Lawv muab faib mus rau hauv lub nram qab no pab pawg:

  • oblique;
  • ncaj.

Tus thawj yog muab faib mus rau hauv:

  • qis;
  • sab saum toj.

Ncaj - yog cov seem plaub, uas yog lub npe hu rau science nyob rau hauv lub npe:

  • qis;
  • sab saum toj;
  • center;
  • sab.

Nyob rau hauv tas li ntawd, lub qhov muag system muaj xws li mechanisms twb lifting lub sab sauv daim tawv muag thiab squinting hais saum toj no.

Cov kab mob txuam nrog impaired qhov muag qauv

Yog li ntawd nws hloov tawm hais tias cov neeg raug kev txom nyem nyob rau hauv qhov sib txawv muaj hnub nyoog ntawm lub qhov muag kab mob. Qhov muag muaj teeb meem plagued lub neeg, tsis hais ntawm lawv cov kev sib raws li txoj cai, nyiaj khwv tau los, nyob tej yam kev mob, haiv neeg twg. Txawm li cas los, nyob rau hauv tej zaum nws yuav yog ib tug predisposition txuam nrog noob caj noob ces, ib puag ncig, los yog lwm yam tseem ceeb. Feem ntau, lub qhov muag ntshawv siab provoked los ntawm:

  • tsis yog txoj hauj lwm ntawm ib tug qauv caij;
  • defect ntawm lub qhov muag.

Paub qhov txawv kab mob:

  • precipitating alleviation;
  • pathological haumxeeb ntshawv siab.

Ntawm thawj pab pawg yog tsis yooj yim dua:

  • myopia;
  • hyperopia;
  • astigmatism.

Qhov thib ob pab pawg neeg no muaj xws li:

  • glaucoma;
  • cataracts;
  • strabismus;
  • anophthalmos;
  • retinal detachment;
  • miodezopsiyu.

Cov feem ntau lately nearsightedness thiab farsightedness. Nyob rau hauv thawj cov ntaub ntawv, lub ceev ceev yog yus muaj los ntawm ib tug ntev ntau dua cov coob. Vim xws deformation teeb tsom tsis muaj ncav lub retina. Vim hais tias ntawm no, ib tug neeg poob rau hauv lub peev xwm kom meej meej pom lub ntiaj teb nyob ib ncig ntawm nws, tshwj xeeb tshaj yog nyob rau hauv qhov kev tshem tawm ntawm cov khoom. Feem ntau cov kws kho qhov tsom iav nrog tsis zoo diopters.

Rau hyperopia yog tsiag ntawv los ntawm opposite duab. Yog vim li cas rau kev ua txhaum yog hais tias lub lens yuav inelastic los yog cov ceev ceev yog txo nyob rau hauv ntev. Kev pab muaj zog rays yog teem qab lub retina twb, thiab cov neeg yuav tsis paub qhov txawv kom meej meej cov khoom uas yog nyob ze. Nyob rau hauv cov ntaub ntawv no, muab tsom iav nrog zoo diopters.

Nco ntsoov: Cov ntsiab lus yog yuav tsum tau muab nkaus xwb los ntawm ib tug ophthalmologist, yog tsis tsim nyog tsa ib tug lens los yog iav koj tus kheej. Thaum xaiv ntsuas qhov muag tshwm sim, xam qhov kev ncua deb ntawm cov tub kawm ntawv thiab scrutiny fundus, thiab paub kev ua txhaum scale. Nyob rau hauv lub tsom xam ntawm tag nrho cov ntaub ntawv tau los ntawm tus kws kho mob pom zoo kom koj xaiv ib tug los yog lwm lub khob, thiab muaj peev xwm kuj qhia kom muaj ib lub lag luam, los yog lwm yam kho lub zeem muag.

Tab sis astigmatism tshwm sim ntau npaum li cas tsawg zaus. Nyob rau hauv no tsis meej lub hlwb yuav tsis tau qhov tseeb cov lus qhia txog cov cheeb tsam surrounding vim lub defect ntawm lub lens, lub cornea, ua rau lub fact tias lub qhov muag loses nws hull duab ntawm ib tus kheej.

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