Uyalazi yini ibanga eliqondile phakathi kwamasongo amnyama amehlo akho amabili (ibanga lezingane ezincane)? Lokhu kubaluleke kakhulu kubantu abagqoka izibuko!

Ingabe ugqoka izibuko? Noma ufuna ukuzithenga? Uma kunjalo, namuhla sizokhuluma ngento ebaluleke kakhulu lapho ukhetha izibuko ezifanelana kahle namehlo akho. Lesi isilinganiso esibizwa ngokuthi 'Ibanga Lomfundi' . Kungenzeka ukuthi awukaze uzwe leli gama ngaphambili. Kodwa-ke, kubaluleke kakhulu ukugcina umbono wakho ucacile.

Iyini le 'banga lomntwana'?

Kalula nje, i-Pupillary Distance , noma i-PD ngamafuphi, ibanga elisuka enkabeni yomfundi wakho (indilinga emnyama phakathi neso lakho) liye enkabeni yomfundi wakho kwelinye iso lakho. Lokhu kuvame ukulinganiswa ngamamilimitha (mm). Ochwepheshe bamehlo ngezinye izikhathi babiza lokhu ngokuthi i-Interpupillary Distance (ID) .

Uma unikezwa umuthi wezibuko, leli nani le-PD libaluleke kakhulu. Ngoba amalensi ezingilazi kudingeka alungiswe ngqo phambi kwamehlo akho. Yilapho uthola khona umbono ocacile ngangokunokwenzeka. Uma uthenga izingilazi ku-inthanethi, uzodinga leli nani le-PD kanye nomuthi wokuhlolwa kwamehlo akho.

Ngingakwazi yini ukukala lokhu ekhaya? Ngingakwenza kanjani?

Yebo, ungazama ukukala i-PD yakho ekhaya uma uthanda. Kodwa-ke, ukuze uthole isilinganiso esinembile kakhulu, kungcono ukuthi silinganiswe uchwepheshe wokunakekelwa kwamehlo oqeqeshiwe . Ngoba ngisho noshintsho oluncane lwamamilimitha ambalwa lungathinta umbono wakho.

Kodwa-ke, uma ufuna ukuzizama wena, okudingayo nje irula eliphawulwe ngamamilimitha (mm) kanye nesibuko. Kunerula ezikhethekile ezitholakala ku-inthanethi eziklanyelwe ngqo ukukala i-PD. Kukhona nezinye izinhlelo zokusebenza ze-smartphone ezithi zikusiza ukuthatha lesi silinganiso. Kodwa-ke, kunzima ukuqiniseka kakhulu ngokunemba kwesilinganiso, kungakhathaliseki ukuthi usilinganisa wena noma ngohlelo lokusebenza.

Uma ufuna ukuzilinganisa, nansi indlela:

Lokhu kungaba nzima kancane, ngakho-ke kudingeka ubekezele.

1. Okokuqala, yima phambi kwesibuko endaweni ekhanyiswe kahle. Gcina ubuso bakho buqhele ngamasentimitha angu-18 ukusuka esibukweni.

2. Manje, phakamisa irula ebusweni bakho ukuze ubone izimpawu zamamilimitha. Ufuna ukubamba irula njengokungathi ubheke udonga, ngaphansi nje kwamehlo akho.

3. Vala iso lakho lesobunxele.

4. Manje, ubheka ngeso lakho lokunene kuphela, beka uphawu luka-zero (0) eruleni ngqo phakathi kwesiyingi esimnyama seso lakho lokunene. Cabanga ukuthi kukhona umugqa ohlukanisa indilinga emnyama kabili, futhi u-zero kufanele abe kulowo mugqa. Ungawususi umbusi kuleli qophelo, kulungile? Uma wenza kanjalo, kuzodingeka uqale phansi.

5. Kulungile, vula iso lakho lesobunxele bese uvala iso lakho lesokudla.

6. Manje, uma ubheka ngeso lakho lesobunxele kuphela, thola uphawu lwemilimitha oluphakathi nendawo yesiyingi esimnyama seso lakho lesobunxele. Njengangaphambili, uma ucabanga ukuthi indilinga emnyama iphakathi kwezimbili, uphawu lwemilimitha oluseduze kakhulu naleso sikhungo yinani lakho le-PD.

Khumbula: Ukulinganisa ngale ndlela kuphela kunzima kancane, futhi amaphutha angenzeka. Ngakho thola usizo uma kungenzeka.

Kulula nakakhulu uma ulinganisa ngosizo lothile!

Kulula nakakhulu uma othile ekusiza. Nansi indlela yokukwenza:

1. Umuntu olinganisa i-PD yakho kufanele ahlale phambi kwakho, cishe amasentimitha angu-18 phakathi kobuso bakho.

2. Kufanele aphakamise irula ebusweni bakho, ukuze abone izimpawu zemilimitha. Irula kufanele libe ngaphansi kwamehlo akho (njengokungathi umbheka ungaphezulu kodonga).

3. Manje, bheka ngqo esweni lesobunxele lomuntu olinganisa i-PD yakho. Kusukela manje kuqhubeke, zama ukunganyakazisi ikhanda lakho.

4. Umuntu olinganisayo kufanele abeke uphawu luka-zero (0) eruleni ukuze lube semkhawulweni wangaphandle wendandatho emnyama yeso lakho lokunene (okungukuthi, umphetho wendandatho emnyama yeso lakho lokunene abangayibona ngakwesobunxele). Ungavumeli irula lihambe kuleli qophelo, ngoba kuzodingeka uqale phansi.

5. Manje, bheka ngqo esweni lesokudla lomuntu olinganisa i-PD yakho.

6. Umuntu olinganisa kufanele abheke uphawu lwemilimitha oluseduze nomngcele wangaphakathi wendandatho emnyama yeso lakho lesobunxele (okungukuthi, umngcele wendandatho emnyama yeso lakho lesobunxele abangayibona ngakwesokudla). Lolo phawu lwemilimitha luyinani lakho le-PD.

Kungani leli 'banga lomntwana' (PD) libaluleke kangaka?

Cabanga ngale ndlela: izimpumputhe emehlweni akho zifana namalensi ekhamera. Ukukhanya kungena ngalezi. Bese, lokhu kukhanya kudlula kulensi engaphakathi kweso bese kuwela ku-retina ngemuva kweso. Yilapho-ke sibona khona.

Kodwa-ke, uma ungaboni kahle, lokhu kukhanya akugxilile kahle. Yingakho sibona amanye amabanga engacacile. Nazi izibonelo ezimbalwa:

• Ukubona kude/i-Hyperopia - ingabona ngokucacile eduze kodwa ayikwazi ukubona kude.
• Ukubona eduze/i-Myopia - Ingabona kahle uma ikude kodwa ayikwazi ukubona eduze.
• I-Presbyopia - isimo esithinta abantu abaningi ngemva kweminyaka engu-40.
• I-Astigmatism - Ukukhanya akugxilile kahle ngenxa yokushintsha kwesimo seso.

Uma kukhulunywa ngezibuko, akuwona wonke umuntu ozothola uhlobo olufanayo lwezibuko. Isizathu salokhu ukuthi izici eziningi zithinta umbono wakho, njengobunzima benkinga yakho yokubona, kanye nenani lamazinga e-astigmatism onawo.

Ngokulinganisa ngokunembile i-PD yakho nokulungisa isikhungo se-optical samalensi akho ukuze abe phakathi nendawo ye-cornea yakho, uzothola okuningi kumalensi akho. Lokhu kuzokunikeza umbono ocacile nokhululekile.

Ingabe 'i-Nasopupillary Distance' ifana nalokhu?

Yebo, kukhona esinye isilinganiso esibalulekile ngaphandle kwe-PD, okuyi-Ibanga Lokungena Kwekhala . Leli ibanga elisuka phakathi kweso lakho elimnyama liye phakathi kwebhuloho lekhala lakho.

Cabanga nje, abantu abane kwabahlanu abanawo amehlo namakhala alinganayo ngokuphelele. Okusho ukuthi, 'Ibanga LaseNasopupillary' alifani kuwo womabili amehlo. Isikhathi esiningi, lo mehluko ungaphansi kwamamilimitha amabili (2mm). Kodwa-ke, cishe koyedwa kubantu abayisithupha, lo mehluko ungaba ngaphezu kwamamilimitha amabili (2mm). Njengoba leli banga lincane, abantu abaningi bangase bangaliboni noma bangazi ngalo. Kodwa-ke, lokhu kungathinta nokwakheka kwezibuko, ikakhulukazi amalensi amaningi.

Kwenzekani uma isilinganiso 'sebanga lomfundi' (PD) singalungile?

Cabanga ukuthi bekuzokwenzekani uma ubungagqoka izibuko ezenziwe ngenani lakho le-PD elingalinganiswanga kahle. Cishe ubungaqala ukuzwa ukungakhululeki okunje:

• Ukucindezeleka kwamehlo
• Ikhanda elibuhlungu
• Ukuphambuka embonweni wakho - izinto zibonakala ziphambukile noma ziphambukile

Nakuba lezi zimpawu zingeyona ingozi kakhulu, zingakubangela ukungakhululeki okukhulu. Futhi, ukubona kwakho kungase kube kubi kakhulu ngenxa yokucindezeleka okungadingekile emehlweni akho. Yingakho kubalulekile ukuba ne-PD efanele.

Ingabe leli 'banga lomfundi' (PD) liyashintsha ngezikhathi ezithile?

Uma usemusha, le PD iyashintsha njengoba ukhula. Okusho ukuthi, i-PD onayo lapho usemusha ayifani nalapho usemusha. Kodwa-ke, leli nani le-PD ngokuvamile alishintshi ngemva kokuba usumdala.

Kodwa-ke, kunezimo ezingavamile kakhulu lapho kungashintsha khona. Isibonelo, uma kufanele uhlinzwe emehlweni noma ebusweni bakho, i-PD yakho ingashintsha kancane ngemva kwalokho kuhlinzwa.

Iyini isilinganiso 'sebanga lomntwana' (PD)?

Inani elimaphakathi le-PD lomuntu omdala lingamamilimitha angu-63 `(63mm)`. Kodwa-ke, lokhu kuyahlukahluka kumuntu nomuntu. Iningi labantu abadala linenani le-PD eliphakathi kwamamilimitha angu-50 no-70 `(50mm - 70mm)`. Inani elincane lamanani e-PD abantu lingahluka ngaphandle kwaleli banga. Abanye abantu bangaba nenani eliphansi elingamamilimitha angu-45 `(45mm)`, kanti abanye bangaba nenani eliphakeme elingamamilimitha angu-80 `(80mm)`.

Kukuziphi izimo okungafanele sithembele kuzo ekwahluleleni kwethu?

Uma usebenzisa izibuko zakho ngenhloso eyodwa kuphela (isibonelo, ukufunda noma umsebenzi olula), i-PD yakho kufanele ilungele leyo njongo. Kodwa-ke, kunezimo ezithile lapho kudingeka khona ukukala i-PD yakho ngokunembile kakhulu . Lezi yizimo lapho:

• Uma udinga amalensi amaningi: Lawa amalensi afana namalensi aqhubekayo, amalensi angaboni kude naseduze, noma amalensi angaboni kude naseduze, noma amalensi angaboni kude naseduze. Ukuze wenze ingxenye ngayinye yala malensi iqonde ngqo, udinga ukwazi inani le-PD ngokunembe kakhulu.
• Uma udinga ukuqhubeka ugqoka izibuko ukuze ubone eduze nakude:Ngoba, uma sibheka into ephambi kwethu, i-PD yethu incipha kancane ngamamilimitha amathathu (3mm).
• Uma une-irises yamehlo akho engalingani kahle (njenge-strabismus): Ezimweni ezinjalo, kubalulekile ukuthi i-PD yakho ihlolwe nguchwepheshe.

Ezimweni ezinjengalezi, kungcono ukuthi i-PD yakho ihlolwe udokotela wamehlo noma uchwepheshe wokunakekelwa kwamehlo oqeqeshiwe kunokuyilinganisa wena.

Kungani le PD ingakhulunywa ngayo ku-prescription yami yezibuko?

Lena inkinga abantu abaningi abanayo. Kwamanye amazwe (isibonelo, i-United States) akukho mthetho odinga ukuthi inani le-PD lishiwo lapho kunikezwa umuthi wezibuko. Kodwa-ke, amanye amazwe anemithetho enjalo. ESri Lanka, ngokuvamile udokotela wakho wamehlo noma umenzi wezibuko uzolinganisa leli nani le-PD futhi aligcine nabo.

Bangase bakwazi ukukunikeza inani le-PD uma ubuza. Kodwa-ke, ezinye izindawo zingase zikhokhise imali ehlukile ngalo. Kodwa-ke, ukuze uthole izibuko ezikulingana kahle, kubalulekile ukuthi leli nani le-PD lilinganiswe ngokunembile. Ngakho-ke, kuwumqondo omuhle ukubuza udokotela wakho wamehlo noma isitolo sezibuko zamehlo ngalokhu.

Ngakho-ke, nansi imiyalezo okufanele uyithathe uye nayo ekhaya:

Kulungile, ngakho-ke nazi ezinye izinto okudingeka uzikhumbule kulokho esikhulume ngakho:

• Ibanga le-Pupillary (PD) liyibanga eliphakathi kwezindandatho ezimnyama zamehlo akho.
• Leli nani le-PD libaluleke kakhulu ekwenzeni izibuko ezikunikeza umbono ocacile nokhululekile .
• Nakuba ungazama ukukala lokhu ekhaya, kungcono ukukala uchwepheshe wokunakekelwa kwamehlo ukuze akulinganise kahle kakhulu.
• Uma isilinganiso se-PD singalungile, ungase uzizwe ungakhululekile njengokukhathala kwamehlo, ikhanda elibuhlungu, ukuphazamiseka kokubona , futhi umbono wakho ungase uwohloke.
• Inani elifanele le-PD libalulekile, ikakhulukazi uma usebenzisa amalensi amaningi noma uma unesifo esifana ne-strabismus.

Ngakho-ke, ngesikhathi esizayo lapho uyolungisa izibuko zakho, naka kancane leli nani le-PD. Ngoba ngisho nomehluko omncane wemilimitha noma amabili ungaba nomthelela omkhulu ekuboneni kwakho! Amehlo amabili aphilile ayinani elikhulu empilweni.

Ibanga lomfundi , izibuko, ukuhlolwa kwamehlo, umbono, impilo yamehlo, ukulinganiswa kwe-PD, ibanga eliphakathi komfundi