Yuav ua li cas ib nkawm tsom iav thiaj li hu ua tsim nyog? Tsis tsuas yog yuav tsum muaj qhov tseeb diopter, tab sis nws kuj yuav tsum tau ua tiav raws li qhov tseeb interpupillary nrug. Yog tias muaj qhov yuam kev tseem ceeb hauv qhov kev ncua deb, tus neeg hnav yuav tsis xis nyob txawm tias lub diopter yog qhov tseeb. Yog li vim li cas ho tsis raug interpupillary nrug ua rau tsis xis nyob? Nrog rau lo lus nug no, cia peb tham txog qee qhov kev paub txog interpupillary nrug.
- Qhov kev ncua deb ntawm interpupillary yog dab tsi?
Qhov kev ncua deb ntawm qhov chaw geometric ntawm cov menyuam kawm ntawv ntawm ob lub qhov muag yog hu ua interpupillary nrug. Nyob rau hauv cov tshuaj optometry, cov ntawv luv yog PD, thiab chav tsev yog mm. Tsuas yog thaum txoj kab ntawm qhov pom ntawm ob lub qhov muag tuaj yeem dhau los ntawm qhov chaw kho qhov muag ntawm lub iav tsom iav tuaj yeem hnav tau yooj yim. Yog li ntawd, thaum ua cov iav tsom iav, koj yuav tsum sim ua kom qhov chaw kho qhov muag nyob deb ntawm cov tsom iav ze rau qhov sib nrug ntawm qhov muag.
- Kev faib tawm ntawm interpupillary nrug?
Vim hais tias tib neeg lub qhov muag converges sab hauv mus rau txawv degrees thaum saib txawv deb. Qhov ze ntawm qhov khoom yog saib, qhov ntau qhov muag converge sab hauv. Yog li ntawd, nyob ntawm seb qhov kev ncua deb, qhov kev ncua deb ntawm interpupillary yog roughly muab faib ua deb interpupillary nrug thiab ze interpupillary nrug. Qhov kev ncua deb interpupillary yog siv rau cov tsom iav kom pom kev deb; qhov ze ntawm interpupillary nrug yog siv rau cov tsom iav ze, uas feem ntau hu ua paj iav.
- Dab tsi yog cov kev ntsuas kev sib nrug deb uas feem ntau siv?
Hauv optometry, cov cuab yeej xws li tus pas ntsuas pupillary, qhov ntsuas qhov deb ntawm lub cev, thiab lub computer refractor feem ntau yog siv los ntsuas. Noj cov feem ntau siv interpupillary nrug txoj kev ua piv txwv, kuv yuav qhia luv luv txoj kev ntsuas ntawm interpupillary nrug:
1. Tus kws kho qhov muag thiab tus kws kho mob zaum ntawm tib qhov siab thiab 40cm sib nrug.
2. Muab tus pas ntsuas interpupillary nrug horizontally nyob rau hauv pem hauv ntej ntawm tus choj ntawm tus neeg mob lub qhov ntswg thiab nyob rau hauv ib tug deb sib npaug zos rau qhov deb ntawm lub tsom iav. Tsis txhob qaij horizontally.
3. Cia tus kws kho qhov muag pom ob lub qhov muag sab laug.
4. Tus kws kho qhov muag kaw nws lub qhov muag sab xis thiab soj ntsuam nrog nws lub qhov muag sab laug kom lub 0 cim ntawm qhov sib txuas ntawm qhov nruab nrab yog tangent mus rau sab hauv ntawm tus menyuam kawm ntawv ntawm qhov muag sab xis.
5. Khaws txoj hauj lwm ntawm tus pas ntsuas interpupillary tsis hloov, qhov kev kawm saib ntawm lub qhov muag sab xis ntawm tus kws kho qhov muag nrog ob lub qhov muag, thiab tus kws kho qhov muag kaw qhov muag sab laug, thiab saib nrog lub qhov muag sab xis. Qhov ntsuas qhov twg tus pas ntsuas interpupillary nrug nrog rau sab ntug ntawm tus menyuam kawm ntawv ntawm qhov kev kawm sab laug qhov muag yog ntsuas qhov kev ncua deb ntawm qhov deb.
- Vim li cas qhov kev ua yuam kev nyob rau hauv interpupillary nrug thaum lub sij hawm ua cov tsom iav ua rau tsis xis nyob?
Tom qab nkag siab qee qhov kev nkag siab yooj yim txog kev sib nrug deb, cia peb rov qab mus rau lo lus nug qhib. Vim li cas ho tsis raug interpupillary nrug ua rau hnav tsis xis nyob?
Thaum ob lub lo ntsiab muag ua tiav, qhov yuam kev tshwm sim nyob rau hauv qhov kev ncua deb, yog li yuav tsum muaj ib qho (lossis ob) qhov muag (s) qhov twg lub teeb tau txais los ntawm qhov pom axis tsis tuaj yeem dhau los ntawm qhov chaw kho qhov muag ntawm lub lens. Lub sijhawm no, vim yog cov nyhuv prism ntawm lub lens, cov kev taw qhia ntawm lub teeb nkag mus rau hauv lub qhov muag raug hloov, thiab cov khoom dluab tsim nyob rau hauv ob lub qhov muag tsis poob ntawm cov ntsiab lus sib xws, ua rau pom ob lub qhov muag (ghosting). Yog li ntawd, lub hlwb yuav tam sim ntawd tsim ib qho kev kho reflex los kho cov nqaij ntshiv extraocular thiab tshem tawm diplopia. Yog tias txoj kev kho no txuas ntxiv mus, nws yuav ua rau tsis xis nyob rau tus neeg hnav, thiab qhov loj dua qhov yuam kev, nws yuav ua rau tsis xis nyob.
Yog tias koj xav paub ntau ntxiv txog tsom iav zam tiam sis thiab kev sib tham hauv kev lag luam, thov mus saib peb lub vev xaib thiab tiv tauj peb txhua lub sijhawm.
Post lub sij hawm: Mar-06-2024