Qhov sib txawv ntawm qhov chaw daj thiab qhov muag tsis pom kev yog qhov chaw daj yog qhov nkag siab rau lub teeb txij li nws muaj photoreceptor cones, thaum lub qhov muag tsis pom kev tsis hnov tsw rau lub teeb vim nws tsis muaj lub teeb pom kev photoreceptor hlwb.
Qhov muag muab peb lub zeem muag. Nws yog lub cev lub cev uas pom lub teeb. Lub qhov muag retina (cov txheej txheem ntawm lub qhov muag) muaj lub teeb pom kev photoreceptor hlwb uas hu ua rods thiab cones. Ib qho chaw daj yog thaj chaw ntawm retina uas muaj xanthophylls. Nws kuj muaj cones. Yog li ntawd, nws yog rhiab heev rau lub teeb thiab tuaj yeem tsim cov duab. Ntawm qhov tod tes, qhov muag tsis pom kev yog qhov chaw uas cov paj hlwb thiab cov hlab ntsha tawm ntawm lub qhov muag. Nws tsis muaj photoreceptor hlwb: rods thiab cones. Li no, nws yog lub teeb insensitive thiab tsis tuaj yeem tsim cov duab.
Dab tsi yog qhov daj?
Ib qho chaw daj lossis macula yog thaj chaw ntawm retina uas nyob ncaj nraim rau ntawm lub qhov muag. Yog li ntawd, nws satiates ntawm qhov chaw ntawm lub retina, me ntsis lateral mus rau qhov muag tsis pom. Nws yog lub teeb rhiab heev thiab tuaj yeem tsim cov duab. Qhov chaw daj muaj xanthophylls. Yog li ntawd, nws tshwm nyob rau hauv ib tug daj xim. Nws kuj muaj compactly packed photoreceptor hlwb, cones muab nws lub siab daws teeb meem. Ntxiv mus, qhov chaw daj yog lub luag haujlwm rau peb lub hauv paus tsis pom kev thiab pom xim.
Daim duab 01: Yellow Spot
Qhov chaw daj tuaj yeem nqus xiav thiab UV ntau dhau uas nkag mus rau peb lub qhov muag. Yog li ntawd, nws ua hauj lwm raws li ib tug natural sunblock los tiv thaiv lub retinal cheeb tsam. Ntxiv mus, qhov chaw daj muaj qhov kev nyuaj siab ntiav hu ua fovea. Qhov kev nyuaj siab no muab qhov pom kev zoo tshaj plaws. Tsis tas li ntawd, nws muaj lub tsho tiv no qhov muag, tsis zoo li qhov muag tsis pom kev.
Dab tsi yog qhov muag tsis pom?
Ib qhov muag tsis pom kev yog qhov chaw ntuj pom ntawm retina ntawm peb lub qhov muag. Nws tseem hu ua scotoma. Txhua qhov muag muaj qhov muag tsis pom kev. Nws yog qhov loj ntawm tus pinhead. Txhua tus vertebrates muaj qhov muag tsis pom ntawm lawv qhov muag. Optic hlab ntsha thiab cov hlab ntsha tawm ntawm lub qhov muag los ntawm qhov no. Photoreceptors xws li rods thiab cones yog tsis tuaj nyob rau hauv qhov chaw dig muag. Yog li ntawd, qhov chaw dig muag tsis tuaj yeem ntes lub teeb thiab tsis hnov tsw rau lub teeb. Yog li ntawd, nws tsis tuaj yeem tsim cov duab. Ntxiv mus, qhov muag tsis pom kev tsis muaj kev nyuaj siab. Tsis tas li ntawd xwb, lub qhov muag tsis pom qhov muag tsis pom kev.
Daim duab 02: Qhov muag tsis pom kev
Dhau li ntawd, qhov muag tsis pom kev yog qhov tshwm sim ntuj tsim. Txawm li cas los xij, nws tuaj yeem txuas rau ntau yam teeb meem xws li migraines, glaucoma, retinal detachment, macular degeneration, ntshav qab zib retinopathy, thiab HIV / AIDS-txog qhov muag teeb meem, thiab lwm yam. Yog li ntawd, yog tias muaj teeb meem cuam tshuam nrog lub zeem muag, xws li qhov khoob lossis cov chaw tsaus nti hauv koj lub zeem muag, thiab koj pom qhov muag tsis pom kev thaum ua haujlwm txhua hnub thiab teeb ci ntsa iab nrog koj qhov muag tsis pom, thiab lwm yam, nws yuav tsum tau sab laj nrog kws kho qhov muag.
Dab tsi yog qhov zoo sib xws ntawm qhov daj thiab qhov muag tsis pom?
- qhov muag daj thiab qhov muag tsis pom yog ob qhov chaw pom ntawm retina ntawm peb lub qhov muag.
- Lawv yog oval-puab.
- Ob leeg yog qhov tseem ceeb ntawm qhov muag.
Qhov txawv ntawm Yellow Spot thiab dig muag yog dab tsi?
Qhov chaw daj yog xim daj, oval-puab thiab lub teeb-rhiab qhov chaw nyob rau hauv nruab nrab ntawm lub retina, uas yog lub luag hauj lwm rau siab acuity pom. Lub qhov muag tsis pom kev yog ib qho oval-zoo li lub teeb tsis pom kev los ntawm cov hlab ntsha thiab cov hlab ntsha tawm ntawm lub qhov muag. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm qhov muag daj thiab qhov muag tsis pom kev. Tsis tas li ntawd, qhov chaw daj muaj kev nyuaj siab, thaum lub qhov muag tsis pom kev tsis muaj kev nyuaj siab. Yog li, qhov no yog lwm qhov sib txawv ntawm qhov chaw daj thiab qhov muag tsis pom kev. Ntxiv mus, qhov chaw daj muaj cov cell photoreceptor, thaum lub qhov muag tsis pom kev tsis muaj photoreceptor hlwb.
Cov hauv qab no qhia ntau qhov sib txawv ntawm qhov chaw daj thiab qhov muag tsis pom hauv daim ntawv teev npe.
Summary – Yellow Spot vs Dig Muag Spot
Ib qho chaw daj yog thaj chaw pigmented pom nyob rau hauv nruab nrab ntawm retina, uas yog rhiab rau lub teeb. Nws yog lub luag haujlwm rau siab acuity tsis pom kev. Yog li, macular degeneration yog qhov ua rau tsis pom kev hauv cov neeg muaj hnub nyoog tshaj 60 xyoo. Lub caij no, qhov muag tsis pom kev yog qhov chaw ntawm retina uas tsis hnov tsw rau lub teeb. Nws tso cai rau cov paj hlwb thiab cov hlab ntsha tawm ntawm lub qhov muag. Ob qho chaw daj thiab qhov muag tsis pom kev yog tej yam ntuj tso uas yog qhov tseem ceeb ntawm peb lub qhov muag. Lawv yog oval-puab. Yog li, qhov no qhia txog qhov sib txawv ntawm qhov muag daj thiab qhov muag tsis pom.
