Ukulungiswa komboniso kubhekisela kwenye yeendlela ezininzi ezisetyenziselwa ukuphucula umbono obonakele obangelwa yimpazamo yokuphika .
Kutheni abanye abantu befuna ukulungiswa kwombono?
Abanye abantu badinga ukulungiswa kwombono ukulungisa impazamo yokukhumbula. Iphutha lokukhupha lenzekile xa iliso lingagqibekanga ngokuchanekileyo (khankanya) njengoko lingena kwilihlo, okubangele umfanekiso obolileyo. Kukho iingxaki ezininzi ezibandakanya impazamo yokuphika.
Yiyiphi imizekelo yesiphene sokukhumbuza?
Iphutha lokurhoxisa, njengento esondeleyo okanye ukujonga phambili , kwenzeka xa ukuma kweso kungavamile. Iso alikwazi ukugoba (okanye ukukhankanya) ukukhanya ngokufanelekileyo, ngoko umbono ubonakala. Ngendlela elula, ukujonga kwangaphambili (myopia) yimeko apho iindawo zokukhanya ziza kugxila phambi kwe-retina. Ngona ndlela, iliso linamandla amabini. Ukunciphisa eli gunya ukwenzela ukuba iingongoma zokukhanya zijolise ngqo kwi-retina, oogqirha banquma ukuba i-lens okanye i-lens. Xa iindawo zokukhanya ziwela ngqo kwi-retina, imifanekiso icacile. Abantu abanengxaki yokujonga izinto bahlala bekhalaza ngombono ube ngcono kwiindawo ezikufutshane kunye ne-blurrier enokude. Ukujonga phambili (i-hyperopia) yimeko apho iindawo zokukhanya ziza kugxila emva kwe-retina. Ngenxa yoko, iliso alinamandla ngokwaneleyo. Ukujonga phambili, oogqirha babonelela kunye okanye ii-lens ezilungileyo.
Iilensi ezininzi zinika amandla amaninzi kwiso ukwenzela ukuba iingongoma zokukhanya zijolise ngqo kwi-retina. Abantu abajonge phambili bavame ukukhalaza ukuba umbono ubonakaliswe kwinqanaba elikufutshane kodwa kukude kakhulu. Xa ukujonga okufutshane okanye ukujonga phambili kufinyelela kumanani aphezulu, yonke imimandla ingaba yinkcazo ecacileyo yolu hlobo luba yinto engafanelekanga.
U-Astigmatism ngowomnye umzekelo wesiphosiso esivamile. I-Astigmatism yinto enzima kakhulu kuba yinto eyimiphunga eyenza ukuphazamisa imifanekiso kunokuba ibenze ibonakale ibonakala. Nge-astigmatism, iliso linokuba negunya elinye kwi-meridian kunye ne-90 degrees away, linamandla elinye. Ukuba ne-astigmatism ngokuqhelekileyo kuthetha ukuba i-cornea, idome ecacileyo njengokwakhiwa kweso kweso, ibonakala njengobhola bebhola, kunokuba ibhola yebhola. Nangona kunjalo, umntu unokufumana i-astigmatism yangaphakathi evela kwi-lens yangaphakathi kwiso. I-Astigmatism ibangela iingongoma ezimbini zokugxila ezingafakwa ngqo kwi-retina. Ezi ngongoma zimbini zijoliswe kuzo zombini zingaphambi kwe-retina, zombini emva kwe-retina okanye enye yangaphambili kunye enye emva kwe-retina. I-Astigmatism inokudideka kodwa ingabangela impawu yeempawu kuquka nombono ongeyonto, umbono ophosakeleyo, umbono otyunjweyo kunye nemibono emibini.
Iindlela eziqhelekileyo zokulungiswa kombono zigqoke iziglasi zamehlo okanye i- lens . Zinceda ukufezekisa umbono ocacileyo ngokuphinda uhlaziye imisebe yokukhanya kwi- retina , ukuhlawulela ukuma kweso.
Utyando olwenziwe ngolu hlobo lolunye uhlobo lokulungiswa komboniso. Ngethuba lokuhlinzwa okwenziwe ngolu hlobo, njenge- LASIK , ikhono lokugxilwa kwamehlo lihlengahlengiswa ngokubuyisela i- cornea (ebusweni bamehlo).