Indlela yokujonga ubungakanani bamaphuzu kubantwana nakubantu abadala?

Ngoku iiglasi zaqala ukwenza kuphela umsebenzi okhuselekileyo okanye wokulungisa, kodwa nazo zikwazi ukufumana imfashishini enokutshintsha ukubonakala komntu kwaye uzalise umfanekiso wesitayela. Kukho iindidi ezinokusebenza zamalensi, kunye nezinye iifom zeefowuni. Kodwa ngaphambi kokuba uthenge imodeli kufuneka ukwazi indlela yokujonga ubungakanani beiglasi, ukuze bakhululeke kwaye bakhululekile ukugqoka.

Ukulungiswa kokungena kwezinto ezifunyenweyo kubaluleke kakhulu, kuba kuya kuba buhlungu kakhulu xa kuthengwa okuthe xaxa emva kwemizuzu embalwa yokugqoka kuya kufakalisa ezinye iinxalenye zobuso okanye, ngokuchaseneyo, ziwa phantsi ngexesha lokuhamba.

Ukuba isakhelo sinemilinganiselo engangqinelani nemimiselo ye-anthropometric, ke ungathengi imodeli oyithandayo.

Ubukhulu bejometri yeeklasi

Ukuze ungenzi iphutha ekukhetheni isakhelo esifanelekileyo, kufuneka ukwazi indlela yokujonga ubungakanani beiglasi. Ukukunceda ekukhetheni isakhelo, kukho iiparameter eziqhelekileyo ezivumela ukuba ukhethe umzekelo olungeleyo ngaphandle komzamo omkhulu. Kukho ezine kuphela:

1. Ububanzi beli lensi.
2. Ukuphakama kwe-lens.
3. Ububanzi bhuloho phakathi kweerms of lens.
4. Ubude beetempile.

Xa ukhetha iiglasi kunye nee-lens eziqhubekayo, enye yeerameters of the frame ibaluleke kakhulu: ukuphakama kweempawu zokukhanya. Ngethuba lokukhethwa kwimizila engqinileyo, ukuphakama kwe-lens kufanele ihambelane nokuyila ngokuqhubekayo kweglasi zamaglasi.

Kungcono ukuqhagamshelana ne-ophthalmologist okanye umcebisi wezilwanyana oza kuphawula oza kunceda ukujonga ukuchaneka kokukhethwa. Ngenxa yale njongo, bajonga ukuthotyelwa kokuphakama ubuncinci bokufakela okuboniswe kumzekelo okhethiweyo weemali zentengiso, kunye nobukhulu bekhefu ezikhethiweyo zezi glasi.

Ubungakanani beiglasi ezikwimida yabo

Iipameters eziphambili ezinceda xa ukhetha izibuko ziboniswa kwiimitha-mitha, ziyakubonakala ngaphakathi ngaphakathi kwe-arc arch. Ezi manani ziya kukunceda uphendule umbuzo - indlela yokujonga ubungakanani bamaphuzu. URay Ban, u-Oakley, uPerol kunye nabanye abenzi bemifanekiso yemveliso yalezi zixhobo zibonisa iiparitha eziphambili kwimveliso yazo. Ngokomzekelo, ubona amanani angama-60 ukuya ku-14 145 ngaphakathi ngaphakathi kwetempile, ahambelana nezi zilandelayo: ububanzi bokuvulwa, emva kokudlula kwi-dash okanye kumfanekiso wesikwere kubonisa ububanzi bhulorho, kwaye ngokuqhubekayo, ngokusebenzisa ibha yendawo - inombolo ebonisa ubude beetempile.

Isalathisi sobubanzi bentengiso ye-lens ayibonakali kangangoko.

Kwaye kwezinye iiglasi zesigaba esingabizi xabiso, ungayifumana inamba enye kuphela - ihambelana nobude be-ear hook.

Njengomthetho, iifowuni zezibuko zelanga zikhulu kunezixhobo zeglasi kunye nomsebenzi wokulungisa.

Misela ububanzi buso

Ulwazi oluchanekileyo lobungakanani buso luya kunceda ukusombulula umbuzo - indlela yokujonga ubungakanani bamaphuzu. Ekhaya, ukulinganisa ububanzi bobuso bunzima, kodwa kunokwenzeka.

Ukwenza oku, udinga iipensele ezimbini okanye ipenki ukuba ibekwe emva kweendlebe zakho, kwaye umgama phakathi kwabo ulinganiswa nomlawuli.

Makhe sibonise indlela enye indlela yokujonga ubungakanani beiglasi, egxininise ubukhulu be-lens. Udinga ukukhupha ububanzi buso bakho ubukhulu be-arch ngaphaya kwebhulophu yakho ekhaleni, uze ususe amanye amasentimitha ayishumi. Inombolo ephumayo kufuneka ihlulwe zibe zibini. Isiphumo sinobukhulu obukhulu be-lens, efanelekileyo ebusweni bakho.

Indlela yokujonga ubungakanani beiglasi zezingane?

Abantwana kunzima ukuhlala ukulinganisa iiparitha zabo zobuso. Ukongeza, ezi zikhombisi zihlala ziguquka, ngokubhekiselele kubukhulu bebhulorho ekhaleni. Ibhuloho kwiiglasi zezingane zibaluleke kakhulu, kuba kungenxa yenguqu ehlala kuyo ububanzi bayo ukuba utshintshe iziglasi zakho emva kwexesha elithile.

Kuze kube neminyaka emithandathu, ubukhulu bebhulorho yepumlo buhluka kancinci, kwaye kwiminyaka esixhenxe okanye yesithoba iipumphu zikhula zize zifikelele kwisayizi yayo.

Ukulinganisa iiparamitha eziphambili eziza kufuneka ukuthenga izibuko, kungcono ukusebenzisa uqeqesho lweengcali okanye wenze ngokwakho xa umntwana elele.

Imigaqo yokukhethwa kweziglasi ngobukhulu

Ukuze ukwazi indlela yokuchaneka ngokuchanekileyo ubukhulu bamaphuzu, kufuneka ulandele iziphakamiso eziliqela xa wenza izilinganiso ezisisiseko:

• Ubungakanani obubanzi besakhelo buchazwe njengesixa-bhulodi kunye nobubanzi beelensi ezimbini, kwaye ububanzi beentsimbi zentsimbi zongezwa kubo, apho iintempile zifakwe kwisiqalo somtya. Inombolo efunyenwe njengesiphumo, njengomgaqo, ikwahlula kwii-millimitha ezine.
• Ubungakanani obubanzi befowuni yezilwanyana kufuneka zihambelane nobubanzi buso apho iiglasi zikhethiweyo kwaye akufanele zihluke kumfanekiso wokugqibela ngamanimitha angaphezu kwamibini okanye amathathu.

Iingcebiso zokuthenga amanqaku

Kungcono ukuthenga izixhobo ezichazwe kwiivenkile ezizodwa okanye i-optics. Ukongezelela, iingcali zincoma ukukhetha iimpawu ezidumile okanye ubuncinci eziqhelekileyo kunye neempawu zeglasi. Kwaye oku kuyimfuneko ukufuna uncedo kumcebisi wezilongwe, ohlala ekhona kwisitoreji esiphezulu esithengisa iilazi.

Xa uthengela izibuko ngokwakho, khokelwa ngubukhulu bexesha elidlulileyo, oluthengwa ngaphambili.