ulwazi lokufunda iiglasi

Yeyiphi ilensi elungele ukufunda iiglasi?

1. Phantsi kweemeko eziqhelekileyo, izinto zokufunda iiglasi kufuneka zenziwe ngesinyithi, kuba iifreyimu zembonakalo kuphela zale nto ziya kuba ngcono kunezo zixhobo eziqhelekileyo, kunye nokumelana okuqinileyo kwe-corrosion kunye nokuchasana okunamandla Ngokuqhelekileyo, izinto zesakhelo ezisetyenzisiweyo azikwazi ezikhethiweyo kwizinto ezichasene nolusu, ngaphandle koko uya kuziva ungakhululekanga kakhulu xa uzinxibe, ngakumbi iiglasi zokufunda zenzelwe abantu abadala, kwaye imizimba yabantu abadala incinci.Abantu babuthathaka ngakumbi, ngoko ke xa ukhetha izinto eziphathekayo, kufuneka ukhethe izinto ezingenakuchaswa kwesikhumba, ngaphandle koko iziphumo ziya kuba yintlekele.

2. Ukongeza, i-lens yeeglasi zokufunda ikhethwa ukuba yenziwe nge-resin.Esi sixhobo sinokumelana ngempumelelo ne-ultraviolet, i-infrared, kunye nezinye izinto.Xa igugile, iya kuba nomlinganiselo othile wokumelana nokudinwa kwamehlo akho, ngaphandle koko iya Emva kokuyisebenzisa ixesha elithile, iya kuvelisa ingqiqo ethile yokudinwa, kwaye nokuba umgangatho awulungile, ezinye izifo zingenzeka.Emva koko, akukho ndlela yokuyiphatha.Ngoko ke, i-resin lens ingcono kakhulu kunelensi eqhelekileyo.Isalathiso se-refractive sikwaphezulu kakhulu.

3. Xa ukhetha i-lens, kufuneka ungeze ifilimu kwi-lens, okanye usebenzise i-aspherical lens.Olu khetho lulungile, lungcono kuneelensi eziqhelekileyo.Ukongeza, inokwenza intsimi yakho yombono icace., Akuyi kubakho miqobo xa ufunda okanye eminye imisebenzi.Akuyi kubakho ukuphazamiseka kwengqondo.

Indlela yokudibanisa iiglasi zokufunda

1. Abanye abantu abadala bafuna ukugcina ingxaki kwaye bathenge iiglasi zokufunda kwivenkile yamehlo okanye esitratweni.Oku akulunganga.Ngenxa yokuba iiglasi zokufunda ezithengwe ngokuthe ngqo zidla ngokuba neqondo elifanayo lamehlo, kodwa amehlo omntu wonke aneemeko ezahlukeneyo ezifana ne-myopia, i-hyperopia, i-astigmatism, kunye neqondo le-presbyopia yamehlo abantu ngokuqinisekileyo eyahlukileyo, kwaye umgama we-interpupillary ukwahluka.Ukuba unxiba ngokungaqhelekanga Kunokubangela umonakalo omkhulu emehlweni, kwaye kulula ukunyusa uxinzelelo, ukukhathala, ukungaboni kakuhle kunye nezinye iimpawu.Kufuneka uqale uye kwisibhedlele samehlo ukuze ufumane uviwo olubanzi lwamehlo ukuze ukhuphe i-cataracts, i-glaucoma, kunye nezifo ze-fundus kunye nezinye izifo ze-fundus, uze ucele ugqirha ukuba afumane i-refraction kwaye anqume umgama we-interpupillary;yenza i-presbyopia lens kunye nesidanga sokulungiswa kombono okufutshane.

2. Abantu abadala bafanele bazame iiglasi okwethutyana emva kokuba zifakelwe.Kukwafanelekile ukuqaphela ukuba ixesha lophicotho lide kancinane.Emva kokugqoka iiglasi zokufunda ixesha elithile, ukuba uvakalelwa kukuba iiglasi azifanelekanga, unokunqanda ukujonga utshintsho kwimbono ekufutshane kwaye ukhethe kwakhona iiglasi.Nikelani ingqalelo kwibhalansi yamehlo, ngaphandle koko kuya kwandisa ubunzima bamehlo kunye nokukhawulezisa i-presbyopia.

3. Iqondo le-presbyopia emehlweni abantu abadala alitshintshi.Emva kokuba iiglasi zifakwe, umbono wabo kufuneka uhlolwe rhoqo rhoqo kwiminyaka emi-2 ukuya kwemi-3;iqondo lelensi kufuneka litshintshwe ngexesha ngokweenguqu kumbono.Ukuba akukho zimpawu ezinjengokuphazamiseka kwefonti, isiyezi kunye nokuhlanza, oko kuthetha ukuba iiglasi zokufunda zifanelekile;ukuba amehlo adiniwe emva kokufunda ixesha elide, oko kuthetha ukuba amandla kufuneka ahlengahlengiswe.

4. Xa ukhetha isakhelo sokubukela, kufuneka ubeke ingqalelo kumbala owuthandayo.Inokubonisa ubunzulu nesidima sabantu abalupheleyo kwanendlela abaziphatha ngayo abalupheleyo.Kukho imibala emininzi yesakhelo, njengale: umbala womnyama;umbala wekofu;iperile emhlophe namhlophe.Isakhelo kufuneka sikhethwe ngokuqina okulungileyo;inamandla okuxhathisa ukugoba.Isitayela sobunzima obulula sinokuqwalaselwa ngabantu abadala ngokwezinto zabo zokuzonwabisa.

Ukungaqondi ngeendondo zokufunda

1. Akulungile ukuba nomfanekiso ophantsi nocacileyo.Iiglasi zokufunda esitratweni zihlala zinenqanaba elifanayo lamehlo kunye nomgama osisigxina we-interpupillary.Nangona kunjalo, uninzi lwabantu abalupheleyo luneempazamo ezinje nge-myopia, i-hyperopia okanye i-astigmatism.Ngaphezu koko, iqondo lokuguga kwamehlo lihlukile, kwaye umgama we-interpupillary ukwahluka.Ukuba unxibe ngokungaqhelekanga iiglasi, kungekhona nje kuphela ukuba kungenakukwazi ukufezekisa umphumo obalaseleyo wokubonwa kwabantu abadala, kodwa kuya kubangela ukuphazamiseka okubonakalayo kunye nokukhathala kwamehlo.

2. Faka iiglasi ngaphandle kwe-Optometry okanye ukuhlolwa.Ngaphambi kokuba unxibe iiglasi zokufunda, yiya esibhedlele ukuze ufumane uvavanyo olubanzi lwamehlo, kubandakanywa ukubona umgama, umbono okufutshane, uxinzelelo lwe-intraocular kunye nokuhlolwa kwe-fundus.Urhatyazo, iglaucoma, kunye nezinye izifo ze-fundus kufuneka zikhutshelwe ngaphandle phambi kokuba i-Optometry igqibe isidanga.

3. Emva kokuba iiglasi zokufunda zigqitywe ukuya ekupheleni, iqondo le-presbyopia liya kwanda ngokunyuka kweminyaka.Emva kokuba iiglasi zokufunda zingafanelekanga, kufuneka zitshintshwe ngexesha, ngaphandle koko kuya kuzisa ukuphazamiseka okukhulu kubomi babantu abadala, kwaye kuya kukhawulezisa iqondo le-presbyopia.Ngexesha elifanayo, iilensi ze-presbyopic zinobomi obulinganiselweyo.Ukuba zisetyenziswe ixesha elide, iilensi ziya kubandezeleka ngenxa yokukrala kunye nokuguga, okuya kunciphisa ubungakanani bokukhanya okudlulayo kwaye kuthintele umgangatho womfanekiso weelensi.

4. Iglasi yokukhulisa ithatha indawo yepresbyopia.Abantu abadala basoloko besebenzisa iindondo zokukhulisa abantwana endaweni yokufunda.Iglasi yokukhulisa egoqwe kwiiglasi zokufunda ilingana ne-1000-2000 degrees.Ixesha elide "lokukholisa" amehlo, kuya kuba nzima ukufumana iqondo elifanelekileyo xa iiglasi zokufunda zihambelana.Ukunxiba iiglasi zokufunda kunokusetyenziswa kuphela ukujonga izinto ezikufutshane.Ukuhamba ngeeglasi zokufunda okanye ukujonga kude ngokuqinisekileyo kuya kwenza umbono ube mfiliba kwaye ube nesiyezi.Ukunxiba iindondo zokufunda kufuneka kujongwe ngokungqongqo, kuba ukuthenga iperi yeglasi yokufunda kunokubangela ukunxitywa kunye nokonakala kwepresbyopia ngenxa yeparameters ezingachanekanga.