Ingabizwa njani iperi yeglasi ukuba ifanelekile? Akufuneki kuphela kubekho i-diopter echanekileyo, kodwa kufuneka iqhutywe ngokomgama ochanekileyo we-interpupillary. Ukuba kukho impazamo enkulu kumgama we-interpupillary, umntu onxibileyo uya kuziva engakhululekanga nokuba i-diopter ichanekile. Ke kutheni umgama ongachanekanga we-interpupillary ubangela ukunxitywa okungakhululekanga? Ngalo mbuzo, makhe sithethe ngolwazi oluthile malunga nomgama we-interpupillary.
- Yintoni umgama we-interpupillary?
Umgama phakathi kwamaziko ejometri yabafundi bamehlo omabini ubizwa ngokuba ngumgama we-interpupillary. Kwi-optometry kagqirha, isifinyezo yi-PD, kunye neyunithi mm. Kuphela kuxa umgca wokubona kwawo omabini amehlo unokudlula kumbindi wokukhanya welensi yeglasi apho unokunxitywa ngokukhululeka. Ngoko ke, xa ulungisa iiglasi, kufuneka uzame ukwenza umgama ophakathi kweeglasi kufuphi nomgama we-interpupillary wamehlo.
- Ukuhlelwa komgama we-interpupillary?
Ngenxa yokuba iliso lomntu lijika libe ngamanqanaba ahlukeneyo xa ejonge imigama eyahlukahlukeneyo. Okukhona into ijongwa ngokusondeleyo, kokukhona amehlo ehlangana ngaphakathi. Ke ngoko, ngokuxhomekeke kumgama wokujongwa, umgama we-interpupillary wahlulahlulwe ngokokude ube ngumgama ophakathi kwe-interpupillary kunye nomgama okufutshane we-interpupillary. Umgama we-interpupillary distance usetyenziselwa iiglasi ukujonga umgama; umgama okufutshane we-interpupillary usetyenziselwa iiglasi ezikufutshane, ezikwaziwa ngokuba ziiglasi zeentyatyambo.
- Zeziphi iindlela eziqhelekileyo zokulinganisa umgama we-interpupillary?
Kwi-Optometry, izixhobo ezifana nerula yomgama we-pupillary, imitha yomgama we-pupillary, kunye ne-refractor yekhompyutha zihlala zisetyenziselwa ukulinganisa. Ndithatha eyona ndlela ixhaphakileyo isetyenziswa kwirula yomgama we-interpupillary njengomzekelo, ndizakwazisa ngokufutshane indlela yomlinganiselo womgama we-interpupillary:
1. Ugqirha wamehlo kunye nomntu bahlala kumphakamo omnye kunye ne-40cm ukuqelelana.
2. Beka irula yomgama we-interpupillary ngokuthe tye phambi kwebhulorho yempumlo yesifundo kwaye kumgama olingana nomgama phakathi kweeglasi zamehlo. Musa ukuyithambeka ngokuthe tye.
3. Make umfundi ajonge kwiliso lasekhohlo likagqirha wamehlo ngamehlo omabini.
4. Ugqirha wamehlo uvala iliso lakhe lasekunene aze ajonge ngeliso lasekhohlo ukuze uphawu olu-0 lwesikali se-interpupillary lujikeleze kuncam ongaphakathi womfundi weliso lasekunene lesifundo.
5. Gcina indawo yerula yomgama we-interpupillary ingatshintshwanga, isifundo sijonge kwiliso lasekunene likagqirha wamehlo ngawo omabini amehlo, aze ugqirha wamehlo avale iliso lasekhohlo, aze aqwalasele ngeliso lasekunene. Isikali apho irula yomgama we-interpupillary ihambelana nomda ongaphandle womfundi weso lasekhohlo lesifundo nguMgama oMngqiniweyo we-interpupillary kumgama.
- Kutheni impazamo kumgama we-interpupillary ngexesha lokucubungula iiglasi kubangela ukungonwabi?
Emva kokuqonda ingqiqo ethile esisiseko malunga nomgama we-interpupillary, masibuyele kumbuzo wokuqala. Kutheni umgama ongachanekanga we-interpupillary ubangela ukunxitywa?
Xa iilensi ezimbini zicutshungulwa, kwenzeka impazamo kumgama we-interpupillary, ngoko ke kufuneka kubekho iliso (okanye amabini) apho ukukhanya okufunyenwe yi-axis ebonakalayo kungenakudlula kwiziko le-optical lens. Ngeli xesha, ngenxa yempembelelo yeprism yelensi, isalathiso sokukhanya okungena esweni siyatshintshwa, kwaye imifanekiso yento eyenziwe kumehlo amabini ayiweli kumanqaku ahambelanayo, okukhokelela ekuboneni kabini (ghosting). Ngenxa yoko, ingqondo iya kuvelisa ngokukhawuleza i-reflex yokulungiswa ukulungisa izihlunu ze-extraocular kunye nokuphelisa i-diplopia. Ukuba le nkqubo yokulungiswa iyaqhubeka, iya kubangela ukungahambi kakuhle kumntu onxibileyo, kwaye impazamo enkulu, iya kuba yinto engenakunyamezeleka.
Ukuba ufuna ukwazi ngakumbi malunga nefashoni yeglasi kunye nothethwano lweshishini, nceda undwendwele iwebhusayithi yethu kwaye uqhagamshelane nathi nangaliphi na ixesha.
Ixesha lokuposa: Mar-06-2024