Yintoni iilensi eziqhubekayo, kwaye ngaba zikulungele?

Umxholo

• Zithini iilensi eziqhubela phambili?
• Iinkqubo zeelensi eziqhubela phambili
  
• Umxhasi wee-lens eziqhubekayo
  
• Zithini izibonelelo zeelensi eziqhubela phambili?
• 1. Kufuneka kuphela iperi yeglasi
• 2. Akukho mgca ujonge bifocal
• 3. Imbonakalo yanamhlanje, yolutsha
• Zeziphi izinto ezingalunganga kwiilensi eziqhubela phambili?
• 1. Kuya kufuneka ufunde ukubona kwiilensi
• 2. Ukugqwethwa kombono okwethutyana
• 3. Ixabiso elingaphezulu lee kwelensi zombono omnye kunye neelensi ezifihlakeleyo
• Ixabisa malini iilensi eziqhubela phambili?
• Ungayichaza njani ukuba ngaba iilensi eziqhubela phambili zikulungele?
• Yise kude

Ushwankathelo

Iiglasi zamehlo ziza ngeendlela ezahlukeneyo. Oku kubandakanya ilensi yombono omnye ngamandla omnye okanye amandla ngaphezulu kwelensi yonke, okanye iilensi ezinesiphazamiso okanye ezithathu ezinamandla amaninzi ngaphezulu kwelensi yonke.

Kodwa ngelixa ezi zimbini zokugqibela zinokukhetha ukuba ufuna amandla ahlukileyo kwiilensi zakho ukuze ubone izinto ezikufuphi nezikufutshane, uninzi lweelensi ezininzi ziyilelwe ngomgca obonakalayo owahlula iindawo ezahlukeneyo zokumiselwa.

Ukuba ukhetha iilensi ezingenamgca we-lens ezininzi okanye zomntwana wakho, iilensi ezongezelelweyo eziqhubekayo (PAL) zinokukhetha.

Zithini iilensi eziqhubela phambili?

Ii-PALs luhlobo lweelensi ezijolise ngokukodwa kubantu abafuna iilensi zokulungisa ukuze babone kude kwaye bavale izinto. Ukuyibeka ngokucacileyo, ezi lensi zikuvumela ukuba ubone ngokucacileyo kwimigama emininzi ngaphandle komgca we-bifocal.

Isidingo seelensi eziqhubela phambili siyanda ngokobudala. Ngeminyaka engama-35 okanye engama-40, abantu abaninzi banobunzima bokujonga amehlo abo kwizinto ezikufuphi.Oku kwaziwa njenge-presbyopia, kwaye ukubuyekeza le ngxaki kugxilwe kuyo, abanye abantu banxiba iiglasi zamehlo ezinombono omnye kumgama, kunye nokufunda iiglasi kufutshane.

Ngelixa le ndlela inokusebenza, ii-PALs zibonelela ngesisombululo esilula, nesilula ngakumbi kwiingxaki ezinxulumene nobudala:

• Icandelo eliphezulu lelensi eqhubekayo linika amandla owafunayo ukuze ubone ngokucacileyo kude.
• Icandelo elisezantsi linika amandla owafunayo ukuze ubone ngokucacileyo kufutshane.
• Icandelo eliphakathi likunceda ubone ngokucacileyo kumgama ophakathi okanye ophakathi.

Ezi lensi zibonelela ngotshintsho ngokuthe ngcembe ngamandla ukusuka phezulu kuye ezantsi.

Nangona abanye abantu befuna iilensi eziqhubela phambili njengoko bekhula, ezi lensi zikwakhona ukhetho kubantwana abadinga iiglasi zamehlo ukuze babone isibindi kufutshane kunye nokubona kude.

Iinkqubo zeelensi eziqhubela phambili

• Isibini seeglasi zento yonke
• Akukho mgca uphazamisayo
• Iiglasi zala maxesha, zolutsha

Umxhasi wee-lens eziqhubekayo

• Kuthatha ixesha ukulungelelanisa
• Ukuphazamiseka okubonakalayo
• Ixabiso eliphezulu

Zithini izibonelelo zeelensi eziqhubela phambili?

Iilensi eziqhubela phambili ayisiyiyo kuphela indlela yokulungisa ukubona kude kunye nokubona kude, banokulungisa i-astigmatism.

I-astigmatism kuxa ukukhanya kungagxili ngokulinganayo kwi-retina ngenxa ye-cornea emile ngokungaqhelekanga, ekhokelela ekuboneni okungacacanga.

Kunye nokulungisa iingxaki zombono, ezinye izibonelelo zelensi eqhubekayo zibandakanya:

1. Kufuneka kuphela iperi yeglasi

Abanye abantu bafumanisa ukuba ilensi eqhubela phambili ingcono kunelensi yombono omnye kuba ivumela ukuba babone ngokucacileyo kwimigama eyahlukeneyo ngaphandle kwesidingo sokuthwala iindondo ezimbini zamehlo.

Iilensi eziqhubela phambili zenza umsebenzi welensi yombono omnye kunye nokufunda iiglasi, ukuze ube neglasi enye kuphela esandleni.

2. Akukho mgca ujonge bifocal

Iilensi eziqhubela phambili zibonelela ngezibonelelo zeelensi ezininzi ngaphandle komgca wee-multifocal. Kwaye ekubeni kukho utshintsho oluthe ngcembe kumandla elensi kunye nelensi eqhubela phambili, awunyanzelekanga ukuba ujongane nalo naluphi na utshintsho olukhawulezileyo lokucaca, oluqhelekileyo kwimigca emininzi.

3. Imbonakalo yanamhlanje, yolutsha

Maxa wambi iiglasi zamehlo ezi-bifocal kunye ne-trifocal ngamanye amaxesha zinxulunyaniswa nokwaluphala. Ke ukunxiba iiglasi zamehlo ezinemigca emibini kunokukwenza uzive ungazithembi. Unokuziva ukhululeke ngakumbi ngelensi eqhubela phambili kuba kungekho layini ibonakala.

Zeziphi izinto ezingalunganga kwiilensi eziqhubela phambili?

Ngelixa iilensi eziqhubela phambili zinokunika "akukho mgca" ukucaca okubonakalayo, kubalulekile ukuqonda okungalunganga kwezi lens.

1. Kuya kufuneka ufunde ukubona kwiilensi

I-Bifocals kunye neelensi ezintathu zinomgca obonakalayo, ke kulula ukufumanisa ukuba ungajonga phi umbono ocacileyo. Kuba iilensi eziqhubela phambili zingenawo umgca, kukho ijika lokufunda, kwaye kungathatha iveki enye ukuya kwezimbini ukufunda indlela echanekileyo yokujonga ngelensi.

2. Ukugqwethwa kombono okwethutyana

Inxalenye esezantsi yeelensi eziqhubela phambili iyandiswa ngenxa yokuba yenzelwe ukufundwa. Ke ukuba amehlo akho ajonge ezantsi xa usuka kumanqwanqwa okanye unyuka unyuko, iinyawo zakho zinokubonakala ngathi zinkulu kwaye kunokuba nzima ukulinganisa inyathelo lakho. Oku kunokubangela ukukhubeka okanye ukukhubeka.

Kuya kufuneka uqeqeshe amehlo akho ukuba ajonge kwicandelo elikude lelensi eqhubela phambili kunenxalenye yokufunda ukuze uphephe iingxaki xa uhamba.

Iilensi eziqhubela phambili zinokubangela nokuphazamiseka kwendlela xa ususa amehlo ngapha nangapha. Ezi zinto zibonakalayo ziye zingabonakali kangako njengoko amehlo akho ehlengahlengiswa kwiilensi.

3. Ixabiso elingaphezulu lee kwelensi zombono omnye kunye neelensi ezifihlakeleyo

Gcina ukhumbula umahluko weendleko phakathi kweelensi eziqhubela phambili, iilensi ezinombono omnye, kunye neelensi ezihamba kunye. Iilensi eziqhubela phambili zibiza kakhulu ngenxa yokuba ufumana iiglasi zamehlo ezintathu kwenye.

Ukongeza, ubhatalela ukulungelwa kunye nexesha elongezelelekileyo eliya ekudaleni i-eyeglass ye-multifocal engenamigca.

Kodwa xa unikwa lula kunye nokulula kweelensi eziqhubela phambili, abanye abantu baziva ngathi iindleko ezongezelelweyo zilungile.

Ixabisa malini iilensi eziqhubela phambili?

Ngokwesiqhelo, ezi lensi zibiza kakhulu kune-bifocal. Umzekelo, ungabhatala i-260 yeedola kwiilensi eziqhubela phambili ezisemgangathweni kunye ne-105 yeedola kuphela kwii-bifocals, ngokweNgxelo zabaThengi.

Uya kuhlawula ngaphezulu iilensi eziqhubela phambili ezikumgangatho ophezulu. Umzekelo, iilensi ezihamba phambili zesalathiso esiphezulu zinokuxabisa i-350 yeedola, ngelixa ungabhatala i-310 yeedola ngenkcazo ephezulu yelensi eqhubekayo. Kwaye ukuba ufuna i-lens enganyangekiyo yokuqhubela phambili, ixabiso lingatsiba ukuya kwi-400 yeedola.

Amaxabiso asenokwahluka ngokwengingqi nakwinkampani yeglasi yamehlo. Ke kubalulekile ukuba ujikeleze kwaye uthelekise amaxabiso.

Ukuthenga kwi-Intanethi kunokuba lukhetho; Nangona kunjalo, inokuba nemingcipheko ethile. Ukuze usebenze ngokufanelekileyo, iilensi eziqhubela phambili kufuneka zilinganiswe emehlweni akho kwaye kunokuba nzima ukufezekisa kwi-intanethi.

Unokucinga kwakhona ukuba uphononongo luka-2011 olwenziwe yiAmerican Optometric Association luveze ukuba iipesenti ezingama-44.8 zeglasi ezili-154 ezi-odolwe kwi-intanethi zinemigqaliselo engachananga okanye imiba yezokhuseleko.

Ngezona ziphumo zihle, cinga ngokusebenza nogqirha onobuchule onokukunceda ukhethe eyona freyimu kunye nohlobo lweelensi.

Ungayichaza njani ukuba ngaba iilensi eziqhubela phambili zikulungele?

Nangona iilensi eziqhubela phambili zikuvumela ukuba ubone kufutshane nakude imigama ngokucacileyo, ezi lensi ayilulo ukhetho olufanelekileyo kuwo wonke umntu.

Abanye abantu abaze balungelelanise ukunxiba ilensi eqhubela phambili. Ukuba oku kuyenzeka kuwe, unokufumana isiyezi rhoqo, iingxaki zokuqonda okunzulu, kunye nokuphazamiseka kwemida.

Kwaye, ukuba usebenza kwikhompyuter, unokufumanisa ukuba ilensi eqhubela phambili rhoqo ayinikezeli ukucaca okufunekayo kumgama ophakathi.

Endaweni yoko unokufuna iilensi zomsebenzi okanye zekhompyuter, ezibonelela ukomelela komgama ophakathi. Oku kunokunciphisa ukudinwa kwamehlo kunye nokudinwa kwamehlo.

Ekuphela kwendlela yokwazi ukuba ngaba iilensi eziqhubela phambili ziya kusebenza kuwe kukuzama kwaye ubone ukuba amehlo akho ahlengahlengisa njani. Ukuba awulungelelanisi emva kweeveki ezimbini, ugqirha wamehlo wakho unokufuna ukulungelelanisa amandla kwiilensi zakho. Ukuba iingxaki ziyaqhubeka, ilensi ebhalwe bifocal ingakulungela ngcono.

Yise kude

Iilensi eziqhubela phambili zilungele ukubona kude kunye nokubona kude, kodwa kukho igophe lokufunda kwaye abanye abantu abaze balungelelanise kwezi lens.

Ukunceda amehlo akho ahlengahlengise, nxiba iilensi eziqhubela phambili rhoqo ekuqaleni. Kwakhona, yiba nomkhwa wokujika intloko ujonge izinto endaweni yokuhambisa amehlo ngapha nangapha. Ukukrola kwicala leziglasi kunokuwuphazamisa umbono wakho.

Xa ufunda, nangona kunjalo, susa amehlo hayi intloko.

Itekhnoloji ye-eyeglass ihlala iphucula. Ke ukuba awukwazi ukunxiba iilensi eziqhubela phambili namhlanje, unokukwazi ukunxiba enye kwixa elizayo.