Incazelo yeso elibona kude
Ukubona eduze noma i-hyperopia yisimo esingavamile samehlo lapho iso lingakwazi ukubona kahle iphuzu eliseduze, noma iphuzu eliseduze libonakala lifiphele. Nakuba kunzima ukubona iphuzu eliseduze, abantu abanokubona eduze bangabona iphuzu elikude. Iphuzu eliseduze yibanga eliseduze kakhulu elingabonwa yiso elivamile. Iso elijwayelekile elijwayelekile linephuzu eliseduze nama-25 cm. Iphuzu elikude yibanga elikude kakhulu elingabonwa ngamehlo avamile. Umuntu ojwayelekile onephuzu elivamile unephuzu elingenamkhawulo. I-Infinite igama elisetshenziselwa ukuchaza ubude bento ekude kakhulu.
Imbangela yokubona kude kwamehlo
Amehlo avamile angabona iphuzu eliseduze ngokucacile ngoba umsebe wokukhanya ugxile ngqo ku-retina. Uma ukubona eduze kungenakukubona iphuzu eliseduze, khona-ke umsebe wokukhanya awugxilile ku-retina. Esweni lomuntu elivamile, umsebe wokukhanya ungagxila ngqo ku-retina lapho iphuzu eliseduze lingu-25 cm, futhi lapho kugxilwe iphuzu eliseduze, ukugoba kwelensi yeso kufaneleke kakhulu. Ngakho-ke, iphuzu eliseduze no-25 cm liyibanga elincane kakhulu lapho i-radius yokugoba kweso ingenakuncishiswa futhi.
Amehlo angaboni eduze awakwazi ukugxila eduze kwamaphuzu angaphakathi kwamasentimitha angama-25 ukusuka esweni. Ngakho-ke, amehlo angaboni eduze anobude obuqondile kanye nerediyasi yokugoba okukhulu kunamehlo avamile. Ukubuyisa ukukhanya kwenziwa yi-cornea kanye nelensi, ngakho-ke kungaphethwa ngokuthi amehlo angaboni eduze ane-cornea kanye nelensi engagobile kakhulu noma eyisicaba.
Ukuze ubude be-radius yokugoba kanye nobude obuqondile beso elibona eduze bube bukhulu kuyilapho iso elivamile line-cornea
kanye nelensi egobile kakhulu noma eyisicaba kancane ukuze irediyasi yokugoba kanye nobude obuqondile ibe ncane.
Ngokusekelwe encazelweni yangaphambilini, kungaphethwa ngokuthi imbangela yokungaboni eduze yi-cornea futhi ilensi yeso ayigobile kangako njengoba kufanele ibe njalo esweni elivamile.
ukuze ubude bokugxila kohlelo lwelensi ye-cornea-eye bubaluleke kakhulu, okwenza ukuthi ukukhanya okuvela endaweni eseduze kungagxili ngqo ku-retina kodwa kugxile ngemuva kwe-retina. Ukukhanya kwento eseduze akugxili ku-retina ukuze amangqamuzana ezinzwa ku-retina angakwazi ukuguqula la maza okukhanya abe izimpawu zikagesi ezidluliselwa ebuchosheni.
Esinye isizathu sokuba umuntu abe nenkinga yokubona eduze ukuthi ingxenye evundlile yeso lomuntu imfushane kakhulu kangangokuthi ukukhanya kuyaphikiswa yi-cornea bese ilensi iwela ngemuva kwe-retina.
I-Hyperopia ifana ne-presbyopia. I-Presbyopia isifo samehlo lapho ikhono leso lokubhekana nesimo lincipha khona ukuze lisondele endaweni ethile njengoba iminyaka ikhula. I-Presbyopia ibangelwa ukuguga, kanti izici zofuzo noma zofuzo zibangela i-hyperopia.
Isixazululo sokubona kude kweso
Amehlo aseduze agxila ukukhanya okuvela endaweni eseduze ngemuva kwe-retina. Ukuze ukukhanya okuseduze kube okuvamile, ukukhanya kumele kugxile kwi-retina. Ukukhanya kungagxila kwi-retina uma kufakwa ilensi ehlanganayo noma ilensi eqondile noma ilensi enhle, ngaphambili kweso. Amalensi aqondile asiza ukuqoqa ukukhanya, ukuze akwazi ukugxila ngqo kwi-retina.
Empilweni yansuku zonke, amehlo aseduze angalungiswa kusetshenziswa amalensi engilazi noma amalensi okuxhumana. Izincazelo zezibalo eziningiliziwe kanye nezibalo ngalesi sihloko zingafundwa ngokubhala ngamalensi engilazi kanye namalensi okuxhumana.
