Abanye besifazane abakholelwa ukuthi izibuko zimbi ukubonakala, zishintshe ngamalensi. Kodwa akulula ukuthola, abantu abaningi bacabanga ukuthi bangakhetha kanjani ama-lens okuxhumana nabo. Ngemuva kwakho konke, udinga ukucabangela okuningi - kusuka kokuphikisana nokuthandayo. Ngaphezu kwalokho, ukuvakashela ophthalmologist kuyimpoqo. Imininingwane eminingi mayelana nenqubo yokukhetha amalensi oxhumana nabo, sizoxoxa ngokuqhubekayo.
Yini okudingeka uqale?
Ukukhetha amalensi kuyinkimbinkimbi, ngakho-ke kufanele ulandele imithetho ethile ezokugcina ekugcineni kwezinkinga zempilo. Okokuqala, kubalulekile ukuqala ngokuvakashela ophthalmologist. Kuyinto efiselekayo ukuthi ukubonisana kwenzeke ehhovisi le-computer ukuxilonga. Imishini yesimanje ingaqondisa ngokunembile ukuthi yiliphi i-lens oyidingayo. Kufaka phakathi, imishini edingekayo izokwazi ukukala i-cornea ukucacisa ububanzi be-lens efanelekayo. Le nombolo ihluka kusuka ku-13 kuya ku-15 mm. Ngaphezu kwalokho, kubalulekile ukutadisha izinhlu ngamalensi abakhiqizi abahlukene, lapho kungabi khona kuphela incazelo ephelele yomkhiqizo, kodwa futhi nemfundo yokunakekelwa kwayo.
Uma ubheke izinhlu eziningana, khetha lezo eziningi ezihambisana nezincomo zikadokotela. Qaphela futhi intengo. Ukulinganisa kwezinga lentengo kunazo zonke kubonakala kuma-lens enenani elingaphezu kwesilinganiso, ngoba linemfanelo enhle, futhi akudingeki ukuba ugcwalise ngokweqile.
Ama-lens
Ngaphambi kokuba uqale ukutadisha ama-lens abakhiqizi abahlukile, kufanelekile ukwazi ukuthi yiziphi izigaba ezasakazwa amalensi oxhumana nabo, futhi yiziphi ezingcono ukuzikhetha, uzosiza ukunquma ukuhlolwa kwakho. Okokuqala, wonke ama-lens ahlukaniswe ngamaqembu amathathu:
- i-astigmatism yokuhlushwa;
- spherical - ukulungisa myopia;
- I-bifocal - ukulungisa ukubhekela phambili.
Kufanele kucatshangelwe ukuthi bahlukaniswe futhi:
- i-soft;
- eqinile.
Ukuqina kwe-lens kuncike ekutheni bakwenziwe. Amalensi amancane afakwa phakathi:
- i-hydrogel;
- abicah-hydrogel.
Eyokuqala yizona ezithambile kakhulu, ngoba igobolondo labo liqukethe i-gel kuphela, futhi ngaphakathi kukhona amanzi. Amalensi amancane aklanyelwe ukulungisa izinga eliphakeme le-astigmatism futhi lenziwe ngamathambo we-thermoplastic ne-silicone. Ngaphakathi, nazo ziqukethe amanzi, kodwa inani lalo alikho ngaphezu kwama-50%.
Ama-lens angaba nobude obuhlukile bokugqoka - kusuka ku-1 usuku kuya enyangeni. Ngezinye izikhathi kuba yisici esinqunyiwe. Ngakho, ama-lens agqoke isikhathi eside angasetshenziswa kusukela ngesonto kuya enyangeni. Kodwa amalensi anjalo, alas, awafanele wonke umuntu, ngakho-ke qaphela. Ama-lens agqoke ngokungafani angagqokwa ngaphandle kokukhipha izinsuku ezilodwa noma ezimbili. Ama-lens wansuku zonke, nawo, angagqoka okungaphezu kosuku olulodwa.
Ukuba nesithakazelo sokuthi ungakhetha kanjani ama-lens oxhumana nabo afanele, kuzodingeka ukuthi uthole ukuthi ihluke ngokwezinga le-hydrophilicity (iphesenti lokuqukethwe kwamanzi). Omncinyane kakhulu
Ungakhetha kanjani amalensi oxhumana nabo abemibala?
Ukukhethwa kwamalensi ombala kunzima kakhulu. Udokotela-ophthalmologist kufanele ahlinzeke ngokubhekisela ekukhethweni kwamalensi ombala . Kodwa ngaphambi kwalokhu, kumele alinganise inani eliqondile, i-dioptric bese ukhetha irejistri. Ukwazi imiphumela yalezi zilinganiso futhi ulalele izincomo zesidokotela, uzokwazi ukuthi ukhethe kanjani ama-lens okuxhumana nawo. Sikukwazisa ukuba unake imikhiqizo evela kubakhiqizi abaziwayo, njengoba banikeza incazelo enembile yemikhiqizo yabo. Ngakho-ke, unethuba elincane lokwenza amaphutha. Ukwengeza, imikhiqizo eyaziwayo iqapha ikhwalithi yemikhiqizo yawo, njengoba isaba ukulahlekelwa inhlonipho ngabathengi nabathengisi.